diff --git a/services/task_executor.py b/services/task_executor.py
index efb8883..5d4038e 100644
--- a/services/task_executor.py
+++ b/services/task_executor.py
@@ -12,6 +12,12 @@ from typing import Dict, Optional, TYPE_CHECKING
 
 from domain.task import Task, TaskType
 from domain.result import TaskResult, ErrorCode
+
+# 需要 GPU 加速的任务类型
+GPU_REQUIRED_TASK_TYPES = {
+    TaskType.RENDER_SEGMENT_VIDEO,
+    TaskType.COMPOSE_TRANSITION,
+}
 from domain.config import WorkerConfig
 from core.handler import TaskHandler
 from services.lease_service import LeaseService
@@ -179,9 +185,10 @@ class TaskExecutor:
         )
         lease_service.start()
 
-        # 获取 GPU 设备
+        # 获取 GPU 设备（仅对需要 GPU 的任务类型）
         device_index = None
-        if self.gpu_scheduler.enabled:
+        needs_gpu = task.task_type in GPU_REQUIRED_TASK_TYPES
+        if needs_gpu and self.gpu_scheduler.enabled:
             device_index = self.gpu_scheduler.acquire()
             if device_index is not None:
                 logger.info(f"[task:{task_id}] Assigned to GPU device {device_index}")
@@ -227,8 +234,8 @@ class TaskExecutor:
             if handler:
                 handler.clear_gpu_device()
 
-            # 释放 GPU 设备
-            if self.gpu_scheduler.enabled:
+            # 释放 GPU 设备（仅当实际分配了设备时）
+            if device_index is not None:
                 self.gpu_scheduler.release(device_index)
 
             # 停止租约续期