Aiming at the smoothness and responding speed of total brake force of electric and mechanical brake system, the closed loop control strategy of brake force based on the feedforward-feedback structure is proposed to meet the demand of driver request brake force and recover the brake energy efficiently. The strategy can harmonize the static distribution and dynamic control of electric and mechanical brake force, and recuperate the dynamic responding speed of mechanical brake force by the rapid responding speed of motor brake force. The feedforward part of strategy calculates the desired characteristic of the brake force, and the feedback part of strategy adjusts the dynamic characteristic of the total and mechanical brake forces by the closed loop algorithm for enhancing the smoothness and responding speed of total brake force. The simulation results indicate that the desired control characteristic of closed loop strategy is validated and the complex control problem of electric and mechanical brake with multi control objective and multi closed loop can be solved well by the feedforward-feedback control structure.