diff --git a/app.py b/app.py
index 81b17bf..2baddc0 100644
--- a/app.py
+++ b/app.py
@@ -922,39 +922,55 @@ def export_certificate_view(cert_id):
                 }
             )
         elif format_type == 'pem_separate':
-            # 创建内存中的zip文件
-            memory_file = BytesIO()
-
-            try:
-                with zipfile.ZipFile(memory_file, 'w', zipfile.ZIP_DEFLATED) as zf:
-                    # 添加证书文件
-                    with open(cert['cert_path'], 'r') as f:
-                        cert_content = f.read()
-                    zf.writestr(f"{cert['common_name']}.pem", cert_content)
-
-                    # 添加私钥文件
-                    with open(cert['key_path'], 'r') as f:
-                        key_content = f.read()
-                    zf.writestr(f"{cert['common_name']}.key", key_content)
-
-                memory_file.seek(0)
-
-                return Response(
-                    memory_file.getvalue(),
-                    mimetype="application/zip",
-                    headers={
-                        "Content-Disposition": f"attachment; filename={cert['common_name']}_separate.zip"
-                    }
-                )
-            except Exception as e:
-                flash(f'创建ZIP文件失败: {str(e)}', 'danger')
-                return redirect(url_for('export_certificate_view', cert_id=cert_id))
+            # 创建内存中的zip文件(.pem + .key)
+            return generate_separate_files_zip(
+                cert,
+                cert_ext=".pem",
+                zip_suffix="_pem_key"
+            )
+        elif format_type == 'crt_separate':
+            # 创建内存中的zip文件(.crt + .key)
+            return generate_separate_files_zip(
+                cert,
+                cert_ext=".crt",
+                zip_suffix="_crt_key"
+            )
         else:
             flash('不支持的导出格式', 'danger')
 
     return render_template('export_certificate.html', cert=cert)
 
 
+def generate_separate_files_zip(cert, cert_ext, zip_suffix):
+    """生成包含分开文件的ZIP包通用函数"""
+    memory_file = BytesIO()
+
+    try:
+        with zipfile.ZipFile(memory_file, 'w', zipfile.ZIP_DEFLATED) as zf:
+            # 添加证书文件
+            with open(cert['cert_path'], 'r') as f:
+                cert_content = f.read()
+            zf.writestr(f"{cert['common_name']}{cert_ext}", cert_content)
+
+            # 添加私钥文件
+            with open(cert['key_path'], 'r') as f:
+                key_content = f.read()
+            zf.writestr(f"{cert['common_name']}.key", key_content)
+
+        memory_file.seek(0)
+
+        return Response(
+            memory_file.getvalue(),
+            mimetype="application/zip",
+            headers={
+                "Content-Disposition": f"attachment; filename={cert['common_name']}{zip_suffix}.zip"
+            }
+        )
+    except Exception as e:
+        flash(f'创建ZIP文件失败: {str(e)}', 'danger')
+        return redirect(url_for('export_certificate_view', cert_id=cert['id']))
+
+
 @app.route('/download/<path:filename>')
 @login_required
 def download_file(filename):
diff --git a/templates/export_certificate.html b/templates/export_certificate.html
index 098e917..a5072ad 100644
--- a/templates/export_certificate.html
+++ b/templates/export_certificate.html
@@ -30,7 +30,14 @@
                     <label class="form-check-label" for="formatPemSeparate">
                         PEM (.pem) - 分开文件
                     </label>
-                    <div class="form-text">Base64编码的证书和私钥作为两个单独文件</div>
+                    <div class="form-text">Base64编码的证书(.pem)和私钥(.key)作为两个单独文件</div>
+                </div>
+                <div class="form-check">
+                    <input class="form-check-input" type="radio" name="format" id="formatCrtSeparate" value="crt_separate">
+                    <label class="form-check-label" for="formatCrtSeparate">
+                        CRT (.crt) - 分开文件
+                    </label>
+                    <div class="form-text">Base64编码的证书(.crt)和私钥(.key)作为两个单独文件</div>
                 </div>
             </div>