Abstract: Based on the existing urban rail train brake system and proper improvement and through accurate control of the deceleration, a new system adopts the large closed loop control mode to carry out precise control of train break. In this paper, the new urban rail brake control system adopting large closed loop control mode and the existing urban rail brake systems are comparatively analyzed from aspects of system composition, main functions and working principle, the advantages of this brake control system are theoretically deduced, which can significantly improve the braking quality for urban rail transit trains and realize accurate fixed-point stop.