diff --git a/ln_jq_app/lib/pages/c_page/reservation/controller.dart b/ln_jq_app/lib/pages/c_page/reservation/controller.dart
index da3ac1e..e53e6c5 100644
--- a/ln_jq_app/lib/pages/c_page/reservation/controller.dart
+++ b/ln_jq_app/lib/pages/c_page/reservation/controller.dart
@@ -290,6 +290,9 @@ class C_ReservationController extends GetxController with BaseControllerMixin {
     );
   }
 
+  // 用于存储上一次成功预约的信息
+  ReservationModel? lastSuccessfulReservation;
+
   /// 提交预约
   void submitReservation() async {
     if (plateNumber.isEmpty) {
@@ -301,10 +304,31 @@ class C_ReservationController extends GetxController with BaseControllerMixin {
       showToast("请输入需要预约的氢量");
       return;
     }
+    double ampuntDouble = (double.tryParse(ampuntStr) ?? 0.0);
+    if (ampuntDouble == 0) {
+      showToast("请输入需要预约的氢量");
+      return;
+    }
+    if (ampuntDouble > (double.tryParse(difference) ?? 0.0)) {
+      showToast('当前最大可预约氢量为${difference}(KG)');
+      return;
+    }
+
     if (selectedStationId.value == null || selectedStationId.value!.isEmpty) {
       showToast("请先选择加氢站");
       return;
     }
+
+    final dateStr = formattedDate;
+    final startTimeStr = '$dateStr ${formattedStartTime}:00';
+    if (lastSuccessfulReservation != null &&
+        lastSuccessfulReservation!.id == selectedStationId.value &&
+        lastSuccessfulReservation!.hydAmount == ampuntStr &&
+        lastSuccessfulReservation!.startTime == startTimeStr) {
+      showToast("请勿重复提交相同的预约");
+      return;
+    }
+
     // 将选择的日期和时间组合成一个完整的 DateTime 对象
     final reservationStartDateTime = DateTime(
       selectedDate.value.year,
@@ -355,6 +379,27 @@ class C_ReservationController extends GetxController with BaseControllerMixin {
       if (result.code == 0) {
         showSuccessToast("预约成功");
 
+        // 预约成功后，保存当前预约信息
+        lastSuccessfulReservation = ReservationModel(
+          id: selectedStationId.value!,
+          hydAmount: ampuntStr,
+          startTime: startTimeStr,
+          endTime: endTimeStr,
+          stationName: selectedStation.name,
+          plateNumber: '',
+          amount: '',
+          time: '',
+          contactPerson: '',
+          contactPhone: '',
+          contacts: '',
+          phone: '',
+          date: '',
+          state: '',
+          stateName: '',
+          addStatus: '',
+          addStatusName: '',
+        );
+
         //打开预约列表
         Future.delayed(const Duration(milliseconds: 800), () {
           getReservationList();
@@ -581,12 +626,14 @@ class C_ReservationController extends GetxController with BaseControllerMixin {
     );
   }
 
-  String leftHydrogen = "0";
   String workEfficiency = "0";
   String fillingWeight = "0";
   String fillingTimes = "0";
   String plateNumber = "";
   String vin = "";
+  String leftHydrogen = "0";
+  num maxHydrogen = 0;
+  String difference = "";
 
   @override
   bool get listenLifecycleEvent => true;
@@ -607,6 +654,7 @@ class C_ReservationController extends GetxController with BaseControllerMixin {
       plateNumber = bean.plateNumber;
       vin = bean.vin;
       plateNumberController = TextEditingController(text: plateNumber);
+      maxHydrogen = bean.maxHydrogen;
       getCatinfo();
       getJqinfo();
     }
@@ -665,6 +713,9 @@ class C_ReservationController extends GetxController with BaseControllerMixin {
       leftHydrogen = result.data["leftHydrogen"].toString();
       workEfficiency = result.data["workEfficiency"].toString();
 
+      final leftHydrogenNum = double.tryParse(leftHydrogen) ?? 0.0;
+      difference = (maxHydrogen - leftHydrogenNum).toStringAsFixed(2);
+
       updateUi();
     } catch (e) {
     } finally {
diff --git a/ln_jq_app/lib/pages/c_page/reservation/view.dart b/ln_jq_app/lib/pages/c_page/reservation/view.dart
index b2a45ae..7b8bfb9 100644
--- a/ln_jq_app/lib/pages/c_page/reservation/view.dart
+++ b/ln_jq_app/lib/pages/c_page/reservation/view.dart
@@ -270,9 +270,9 @@ class ReservationPage extends GetView<C_ReservationController> {
                 onTap: () => controller.pickTime(context, false),
               ),
               _buildTextField(
-                label: '预约氢量(kg)',
+                label: '预约氢量(KG)',
                 controller: controller.amountController,
-                hint: '请输入氢量(kg)',
+                hint: '当前最大可预约氢量${controller.difference}(KG)',
                 keyboardType: TextInputType.number,
               ),
               _buildTextField(