This paper mainly describes a PC-based Brake-By-Wire Hardware-In-Loop-simulation Bench which has high efficiency and applicability. System architecture, hardware configuration, and software model of this bench are presented in details. The electric braking controllers collect, process and transfer all kinds of information, and generate simultaneous control codes according to the control algorithm, then drive electromechanical actuator and braking parts. For improving the safety and reliability, redundancy is adopted to realize reconstruction when the simulation system occurs faults. Experiments show this simulation bench is a practical tool for the design, test and parameter optimization for electric braking system.