In order to solve the problem of slow response and packet loss which are caused by the introduction of the bus in the robot control system, a task scheduling scheme is designed, and the scheduling policy based on improved fuzzy feedback EDF is proposed, which adjusts dynamically the task priority according to the combined effects of the response time and transmission errors. The feasibility of scheduling strategy is valideted through the robot control experiments. The results show that the performance of system response time and packet loss ratio can be improved significantly after adding scheduling module, and the real time performance of the system is also improved.