diff --git a/app_new/logs/routes.py b/app_new/logs/routes.py
index c74b92a..86513bd 100644
--- a/app_new/logs/routes.py
+++ b/app_new/logs/routes.py
@@ -1,8 +1,10 @@
 """Logs centralises des watchdogs."""
-from flask import Blueprint, render_template, request, jsonify
+from flask import Blueprint, render_template, request, jsonify, flash, redirect, url_for
 from flask_login import login_required
+from sqlalchemy import text
 from app_new.extensions import db
 from app_new.core.models.maintenance import WatchdogLog
+from app_new.core.system_security import system_admin_required
 
 logs_bp = Blueprint('logs', __name__, url_prefix='/logs', template_folder='templates')
 
@@ -57,3 +59,13 @@ def api_recent():
         'message': log.message,
         'created_at': log.created_at.isoformat() if log.created_at else None
     } for log in logs])
+
+
+@logs_bp.route('/clear', methods=['POST'])
+@system_admin_required
+def clear_watchdog_logs():
+    """Vide integralement la table dediee aux journaux des watchdogs."""
+    db.session.execute(text('TRUNCATE TABLE watchdog_logs'))
+    db.session.commit()
+    flash('Les journaux des watchdogs ont été vidés.', 'success')
+    return redirect(url_for('logs.index'))
diff --git a/app_new/logs/templates/logs/index.html b/app_new/logs/templates/logs/index.html
index 7fe5942..e9fcbea 100644
--- a/app_new/logs/templates/logs/index.html
+++ b/app_new/logs/templates/logs/index.html
@@ -4,7 +4,17 @@
 {% block content %}
 <div class="d-flex justify-content-between align-items-center mb-3">
     <h2 class="h5 mb-0"><i class="bi bi-journal-text"></i> Logs des watchdogs</h2>
-    <a href="{{ url_for('logs.api_recent', limit=100) }}" class="btn btn-sm btn-outline-secondary" target="_blank"><i class="bi bi-download"></i> API JSON</a>
+    <div class="d-flex gap-2">
+        <a href="{{ url_for('logs.api_recent', limit=100) }}" class="btn btn-sm btn-outline-secondary" target="_blank"><i class="bi bi-download"></i> API JSON</a>
+        {% if current_user.is_admin() %}
+        <form method="POST" action="{{ url_for('logs.clear_watchdog_logs') }}" onsubmit="return confirm('Vider définitivement tous les journaux des watchdogs ?');">
+            <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
+            <button type="submit" class="btn btn-sm btn-outline-danger">
+                <i class="bi bi-trash3"></i> Vider les logs
+            </button>
+        </form>
+        {% endif %}
+    </div>
 </div>
 
 <div class="card border-0 shadow-sm mb-3">
diff --git a/tests/integration/test_watchdog_logs.py b/tests/integration/test_watchdog_logs.py
new file mode 100644
index 0000000..5219f01
--- /dev/null
+++ b/tests/integration/test_watchdog_logs.py
@@ -0,0 +1,20 @@
+from app_new.extensions import db
+from app_new.core.models.maintenance import WatchdogLog
+
+
+def test_admin_can_clear_watchdog_logs(app, authenticated_client):
+    with app.app_context():
+        db.session.add(
+            WatchdogLog(
+                watchdog_name='test_watchdog',
+                level='info',
+                message='journal de test',
+            )
+        )
+        db.session.commit()
+
+    response = authenticated_client.post('/logs/clear')
+    assert response.status_code == 302
+
+    with app.app_context():
+        assert WatchdogLog.query.count() == 0