diff --git a/src/app/admin/campaigns/[id]/participants/page.tsx b/src/app/admin/campaigns/[id]/participants/page.tsx
index 5fc52fc..5304256 100644
--- a/src/app/admin/campaigns/[id]/participants/page.tsx
+++ b/src/app/admin/campaigns/[id]/participants/page.tsx
@@ -7,6 +7,7 @@ import { campaignService, participantService, voteService } from '@/lib/services
 import AddParticipantModal from '@/components/AddParticipantModal';
 import EditParticipantModal from '@/components/EditParticipantModal';
 import DeleteParticipantModal from '@/components/DeleteParticipantModal';
+import ImportCSVModal from '@/components/ImportCSVModal';
 import { Button } from '@/components/ui/button';
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
 import { Badge } from '@/components/ui/badge';
@@ -14,7 +15,7 @@ import { Avatar, AvatarFallback } from '@/components/ui/avatar';
 import { Input } from '@/components/ui/input';
 import Navigation from '@/components/Navigation';
 import AuthGuard from '@/components/AuthGuard';
-import { Users, User, Calendar, Mail, Vote, Copy, Check } from 'lucide-react';
+import { Users, User, Calendar, Mail, Vote, Copy, Check, Upload } from 'lucide-react';
 
 export const dynamic = 'force-dynamic';
 
@@ -27,6 +28,7 @@ function CampaignParticipantsPageContent() {
   const [showAddModal, setShowAddModal] = useState(false);
   const [showEditModal, setShowEditModal] = useState(false);
   const [showDeleteModal, setShowDeleteModal] = useState(false);
+  const [showImportModal, setShowImportModal] = useState(false);
   const [selectedParticipant, setSelectedParticipant] = useState<Participant | null>(null);
   const [copiedParticipantId, setCopiedParticipantId] = useState<string | null>(null);
 
@@ -67,6 +69,26 @@ function CampaignParticipantsPageContent() {
     loadData();
   };
 
+  const handleImportParticipants = async (data: any[]) => {
+    try {
+      const participantsToCreate = data.map(row => ({
+        campaign_id: campaignId,
+        first_name: row.first_name || '',
+        last_name: row.last_name || '',
+        email: row.email || ''
+      }));
+
+      // Créer les participants un par un
+      for (const participant of participantsToCreate) {
+        await participantService.create(participant);
+      }
+
+      loadData();
+    } catch (error) {
+      console.error('Erreur lors de l\'import des participants:', error);
+    }
+  };
+
   const getInitials = (firstName: string, lastName: string) => {
     return `${firstName.charAt(0)}${lastName.charAt(0)}`.toUpperCase();
   };
@@ -139,9 +161,15 @@ function CampaignParticipantsPageContent() {
                 {campaign.title}
               </p>
             </div>
-            <Button onClick={() => setShowAddModal(true)} size="lg">
-              ✨ Nouveau participant
-            </Button>
+            <div className="flex gap-2">
+              <Button variant="outline" onClick={() => setShowImportModal(true)}>
+                <Upload className="w-4 h-4 mr-2" />
+                Importer CSV
+              </Button>
+              <Button onClick={() => setShowAddModal(true)} size="lg">
+                ✨ Nouveau participant
+              </Button>
+            </div>
           </div>
         </div>
 
@@ -366,6 +394,14 @@ function CampaignParticipantsPageContent() {
             participant={selectedParticipant}
           />
         )}
+
+        <ImportCSVModal
+          isOpen={showImportModal}
+          onClose={() => setShowImportModal(false)}
+          onImport={handleImportParticipants}
+          type="participants"
+          campaignTitle={campaign?.title}
+        />
       </div>
     </div>
   );
diff --git a/src/app/admin/campaigns/[id]/propositions/page.tsx b/src/app/admin/campaigns/[id]/propositions/page.tsx
index 37bd16d..dfcf09a 100644
--- a/src/app/admin/campaigns/[id]/propositions/page.tsx
+++ b/src/app/admin/campaigns/[id]/propositions/page.tsx
@@ -7,13 +7,14 @@ import { campaignService, propositionService } from '@/lib/services';
 import AddPropositionModal from '@/components/AddPropositionModal';
 import EditPropositionModal from '@/components/EditPropositionModal';
 import DeletePropositionModal from '@/components/DeletePropositionModal';
+import ImportCSVModal from '@/components/ImportCSVModal';
 import { Button } from '@/components/ui/button';
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
 import { Badge } from '@/components/ui/badge';
 import { Avatar, AvatarFallback } from '@/components/ui/avatar';
 import Navigation from '@/components/Navigation';
 import AuthGuard from '@/components/AuthGuard';
-import { FileText, User, Calendar, Mail } from 'lucide-react';
+import { FileText, User, Calendar, Mail, Upload } from 'lucide-react';
 
 export const dynamic = 'force-dynamic';
 
@@ -26,6 +27,7 @@ function CampaignPropositionsPageContent() {
   const [showAddModal, setShowAddModal] = useState(false);
   const [showEditModal, setShowEditModal] = useState(false);
   const [showDeleteModal, setShowDeleteModal] = useState(false);
+  const [showImportModal, setShowImportModal] = useState(false);
   const [selectedProposition, setSelectedProposition] = useState<Proposition | null>(null);
 
   useEffect(() => {
@@ -65,6 +67,28 @@ function CampaignPropositionsPageContent() {
     loadData();
   };
 
+  const handleImportPropositions = async (data: any[]) => {
+    try {
+      const propositionsToCreate = data.map(row => ({
+        campaign_id: campaignId,
+        title: row.title || '',
+        description: row.description || '',
+        author_first_name: row.author_first_name || 'admin',
+        author_last_name: row.author_last_name || 'admin',
+        author_email: row.author_email || 'admin@example.com'
+      }));
+
+      // Créer les propositions une par une
+      for (const proposition of propositionsToCreate) {
+        await propositionService.create(proposition);
+      }
+
+      loadData();
+    } catch (error) {
+      console.error('Erreur lors de l\'import des propositions:', error);
+    }
+  };
+
   const getInitials = (firstName: string, lastName: string) => {
     return `${firstName.charAt(0)}${lastName.charAt(0)}`.toUpperCase();
   };
@@ -127,9 +151,15 @@ function CampaignPropositionsPageContent() {
                 {campaign.title}
               </p>
             </div>
-            <Button onClick={() => setShowAddModal(true)} size="lg">
-              ✨ Nouvelle proposition
-            </Button>
+            <div className="flex gap-2">
+              <Button variant="outline" onClick={() => setShowImportModal(true)}>
+                <Upload className="w-4 h-4 mr-2" />
+                Importer CSV
+              </Button>
+              <Button onClick={() => setShowAddModal(true)} size="lg">
+                ✨ Nouvelle proposition
+              </Button>
+            </div>
           </div>
         </div>
 
@@ -292,6 +322,14 @@ function CampaignPropositionsPageContent() {
             proposition={selectedProposition}
           />
         )}
+
+        <ImportCSVModal
+          isOpen={showImportModal}
+          onClose={() => setShowImportModal(false)}
+          onImport={handleImportPropositions}
+          type="propositions"
+          campaignTitle={campaign?.title}
+        />
       </div>
     </div>
   );
diff --git a/src/components/ImportCSVModal.tsx b/src/components/ImportCSVModal.tsx
new file mode 100644
index 0000000..fd0e3ba
--- /dev/null
+++ b/src/components/ImportCSVModal.tsx
@@ -0,0 +1,239 @@
+'use client';
+
+import { useState } from 'react';
+import { Button } from '@/components/ui/button';
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogTitle,
+} from '@/components/ui/dialog';
+import { Input } from '@/components/ui/input';
+import { Label } from '@/components/ui/label';
+import { Alert, AlertDescription } from '@/components/ui/alert';
+import { Upload, FileText, Download, AlertCircle } from 'lucide-react';
+
+interface ImportCSVModalProps {
+  isOpen: boolean;
+  onClose: () => void;
+  onImport: (data: any[]) => void;
+  type: 'propositions' | 'participants';
+  campaignTitle?: string;
+}
+
+export default function ImportCSVModal({ 
+  isOpen, 
+  onClose, 
+  onImport, 
+  type, 
+  campaignTitle 
+}: ImportCSVModalProps) {
+  const [file, setFile] = useState<File | null>(null);
+  const [loading, setLoading] = useState(false);
+  const [error, setError] = useState('');
+  const [preview, setPreview] = useState<any[]>([]);
+
+  const handleFileChange = (e: React.ChangeEvent<HTMLInputElement>) => {
+    const selectedFile = e.target.files?.[0];
+    if (selectedFile) {
+      if (selectedFile.type !== 'text/csv' && !selectedFile.name.endsWith('.csv')) {
+        setError('Veuillez sélectionner un fichier CSV valide.');
+        return;
+      }
+      setFile(selectedFile);
+      setError('');
+      parseCSV(selectedFile);
+    }
+  };
+
+  const parseCSV = (file: File) => {
+    const reader = new FileReader();
+    reader.onload = (e) => {
+      const text = e.target?.result as string;
+      const lines = text.split('\n').filter(line => line.trim());
+      
+      if (lines.length < 2) {
+        setError('Le fichier CSV doit contenir au moins un en-tête et une ligne de données.');
+        return;
+      }
+
+      const headers = lines[0].split(',').map(h => h.trim().replace(/"/g, ''));
+      const data = lines.slice(1).map(line => {
+        const values = line.split(',').map(v => v.trim().replace(/"/g, ''));
+        const row: any = {};
+        headers.forEach((header, index) => {
+          row[header] = values[index] || '';
+        });
+        return row;
+      });
+
+      setPreview(data.slice(0, 5)); // Afficher les 5 premières lignes
+    };
+    reader.readAsText(file);
+  };
+
+  const handleImport = async () => {
+    if (!file) return;
+    
+    setLoading(true);
+    try {
+      const reader = new FileReader();
+      reader.onload = (e) => {
+        const text = e.target?.result as string;
+        const lines = text.split('\n').filter(line => line.trim());
+        const headers = lines[0].split(',').map(h => h.trim().replace(/"/g, ''));
+        const data = lines.slice(1).map(line => {
+          const values = line.split(',').map(v => v.trim().replace(/"/g, ''));
+          const row: any = {};
+          headers.forEach((header, index) => {
+            row[header] = values[index] || '';
+          });
+          return row;
+        });
+
+        onImport(data);
+        onClose();
+        setFile(null);
+        setPreview([]);
+      };
+      reader.readAsText(file);
+    } catch (error) {
+      setError('Erreur lors de l\'import du fichier.');
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  const getExpectedColumns = () => {
+    if (type === 'propositions') {
+      return ['title', 'description', 'author_first_name', 'author_last_name', 'author_email'];
+    } else {
+      return ['first_name', 'last_name', 'email'];
+    }
+  };
+
+  const downloadTemplate = () => {
+    const columns = getExpectedColumns();
+    const csvContent = columns.join(',') + '\n';
+    const blob = new Blob([csvContent], { type: 'text/csv' });
+    const url = window.URL.createObjectURL(blob);
+    const a = document.createElement('a');
+    a.href = url;
+    a.download = `template_${type}.csv`;
+    a.click();
+    window.URL.revokeObjectURL(url);
+  };
+
+  return (
+    <Dialog open={isOpen} onOpenChange={onClose}>
+      <DialogContent className="sm:max-w-[600px]">
+        <DialogHeader>
+          <DialogTitle className="flex items-center gap-2">
+            <Upload className="w-5 h-5" />
+            Importer des {type === 'propositions' ? 'propositions' : 'participants'} depuis CSV
+          </DialogTitle>
+          <DialogDescription>
+            Importez en masse des {type === 'propositions' ? 'propositions' : 'participants'} depuis un fichier CSV.
+            {campaignTitle && (
+              <span className="block mt-1 font-medium">
+                Campagne : {campaignTitle}
+              </span>
+            )}
+          </DialogDescription>
+        </DialogHeader>
+
+        <div className="space-y-4">
+          {/* Template download */}
+          <div className="flex items-center justify-between p-3 bg-slate-50 dark:bg-slate-800 rounded-lg">
+            <div className="flex items-center gap-2">
+              <FileText className="w-4 h-4 text-slate-600" />
+              <span className="text-sm text-slate-600 dark:text-slate-300">
+                Téléchargez le modèle CSV
+              </span>
+            </div>
+            <Button variant="outline" size="sm" onClick={downloadTemplate}>
+              <Download className="w-4 h-4 mr-1" />
+              Modèle
+            </Button>
+          </div>
+
+          {/* Expected columns */}
+          <div className="p-3 bg-blue-50 dark:bg-blue-900/20 rounded-lg">
+            <h4 className="font-medium text-blue-900 dark:text-blue-100 mb-2">
+              Colonnes attendues :
+            </h4>
+            <div className="text-sm text-blue-800 dark:text-blue-200">
+              {getExpectedColumns().join(', ')}
+            </div>
+          </div>
+
+          {/* File upload */}
+          <div className="space-y-2">
+            <Label htmlFor="csv-file">Sélectionner un fichier CSV</Label>
+            <Input
+              id="csv-file"
+              type="file"
+              accept=".csv"
+              onChange={handleFileChange}
+              className="cursor-pointer"
+            />
+          </div>
+
+          {/* Error message */}
+          {error && (
+            <Alert variant="destructive">
+              <AlertCircle className="h-4 w-4" />
+              <AlertDescription>{error}</AlertDescription>
+            </Alert>
+          )}
+
+          {/* Preview */}
+          {preview.length > 0 && (
+            <div className="space-y-2">
+              <Label>Aperçu des données (5 premières lignes)</Label>
+              <div className="max-h-40 overflow-y-auto border rounded-lg">
+                <table className="w-full text-sm">
+                  <thead className="bg-slate-50 dark:bg-slate-800">
+                    <tr>
+                      {Object.keys(preview[0] || {}).map((header) => (
+                        <th key={header} className="px-2 py-1 text-left font-medium">
+                          {header}
+                        </th>
+                      ))}
+                    </tr>
+                  </thead>
+                  <tbody>
+                    {preview.map((row, index) => (
+                      <tr key={index} className="border-t">
+                        {Object.values(row).map((value, cellIndex) => (
+                          <td key={cellIndex} className="px-2 py-1 text-xs">
+                            {String(value)}
+                          </td>
+                        ))}
+                      </tr>
+                    ))}
+                  </tbody>
+                </table>
+              </div>
+            </div>
+          )}
+        </div>
+
+        <DialogFooter>
+          <Button variant="outline" onClick={onClose}>
+            Annuler
+          </Button>
+          <Button 
+            onClick={handleImport} 
+            disabled={!file || loading}
+            className="min-w-[100px]"
+          >
+            {loading ? 'Import...' : 'Importer'}
+          </Button>
+        </DialogFooter>
+      </DialogContent>
+    </Dialog>
+  );
+}
diff --git a/src/components/ui/alert.tsx b/src/components/ui/alert.tsx
new file mode 100644
index 0000000..1421354
--- /dev/null
+++ b/src/components/ui/alert.tsx
@@ -0,0 +1,66 @@
+import * as React from "react"
+import { cva, type VariantProps } from "class-variance-authority"
+
+import { cn } from "@/lib/utils"
+
+const alertVariants = cva(
+  "relative w-full rounded-lg border px-4 py-3 text-sm grid has-[>svg]:grid-cols-[calc(var(--spacing)*4)_1fr] grid-cols-[0_1fr] has-[>svg]:gap-x-3 gap-y-0.5 items-start [&>svg]:size-4 [&>svg]:translate-y-0.5 [&>svg]:text-current",
+  {
+    variants: {
+      variant: {
+        default: "bg-card text-card-foreground",
+        destructive:
+          "text-destructive bg-card [&>svg]:text-current *:data-[slot=alert-description]:text-destructive/90",
+      },
+    },
+    defaultVariants: {
+      variant: "default",
+    },
+  }
+)
+
+function Alert({
+  className,
+  variant,
+  ...props
+}: React.ComponentProps<"div"> & VariantProps<typeof alertVariants>) {
+  return (
+    <div
+      data-slot="alert"
+      role="alert"
+      className={cn(alertVariants({ variant }), className)}
+      {...props}
+    />
+  )
+}
+
+function AlertTitle({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="alert-title"
+      className={cn(
+        "col-start-2 line-clamp-1 min-h-4 font-medium tracking-tight",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function AlertDescription({
+  className,
+  ...props
+}: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="alert-description"
+      className={cn(
+        "text-muted-foreground col-start-2 grid justify-items-start gap-1 text-sm [&_p]:leading-relaxed",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+export { Alert, AlertTitle, AlertDescription }