diff --git a/src/main/java/com/ruoyi/device/domain/model/thingsboard/constants/DeviceTelemetry.java b/src/main/java/com/ruoyi/device/domain/model/thingsboard/constants/DeviceTelemetry.java
index 86bedd4..274d4f7 100644
--- a/src/main/java/com/ruoyi/device/domain/model/thingsboard/constants/DeviceTelemetry.java
+++ b/src/main/java/com/ruoyi/device/domain/model/thingsboard/constants/DeviceTelemetry.java
@@ -443,6 +443,21 @@ public class DeviceTelemetry {
             }
     );
 
+    /**
+     * 总飞行时长（单位：秒）
+     */
+    public static final TelemetryKey<Integer> Total_Flight_Time = TelemetryKey.of(
+            "total_flight_time",
+            Integer.class,
+            value -> {
+                if (value == null) return null;
+                if (value instanceof Number) {
+                    return ((Number) value).intValue();
+                }
+                return Integer.parseInt(value.toString());
+            }
+    );
+
 
 
     /**
@@ -470,6 +485,7 @@ public class DeviceTelemetry {
                 FlightTask_Step_Code,
                 Sub_Device_Online_Status,
                 Total_Flight_Sorties,
+                Total_Flight_Time,
                 Drone_Charge_State_State,
                 Drone_In_Dock,
                 Acc_Time,
diff --git a/src/main/java/com/ruoyi/device/service/impl/BufferDeviceImpl.java b/src/main/java/com/ruoyi/device/service/impl/BufferDeviceImpl.java
index ee97b85..824e32c 100644
--- a/src/main/java/com/ruoyi/device/service/impl/BufferDeviceImpl.java
+++ b/src/main/java/com/ruoyi/device/service/impl/BufferDeviceImpl.java
@@ -190,6 +190,17 @@ public class BufferDeviceImpl implements IBufferDeviceService
                     }
                 });
 
+        // 飞行时长 - 从 total_flight_time 获取秒数并转换为天
+        telemetryMap.get(DeviceTelemetry.Total_Flight_Time)
+                .ifPresent(telemetryValue -> {
+                    Integer seconds = telemetryValue.getValue();
+                    if (seconds != null) {
+                        // 将秒转换为天：秒 / (60 * 60 * 24)
+                        Integer days = seconds / (60 * 60 * 24);
+                        dto.setFlightDuration(days);
+                    }
+                });
+
         return dto;
     }