Abstract: Objective: After urban rail transit train applying normal braking during entry and parking at station or on large gradient ramp, the problem of train startup delay due to abnormal brake release occurs, thus it is necessary to study the optimization of train brake holding control logic. Method: By analyzing the design principle of train holding brake, the reason for the magnitude of braking force applied and the control logic of braking application/release are analyzed emphatically. The specific errors during design that cause brake holding are identified, and the design optimization of faulty train brake holding is conducted. Result & Conclusion: Design principle of setting brake holding force at 45% of maximum full service braking force is proposed, as well as the logic control method of braking application/release according to specific projects. The logic of releasing the held brake is changed from the condition of train nonzero speed to 2 seconds after train traction establishment, solving the problem of train abnormal brake release after normal parking braking application.