The function of oil scavenger pump motor in ABS hydraulic regulating system was studied by analyzing structure of the ABS hydraulic regulating system. The model of ABS hydraulic regulator was built and the closedloop speed control system based on the DC motor PI regulation was designed. On this basis, the ABS hydraulic regulator model based on AMESim and Simulink co-simulation was established. Combined with the drainage demand of lowpressure accumulator, the grading speed regulation control strategy of oil scavenger motor was used for simulation. The simulation results show that the target speed of the motor can be given according to the discharge demand of the low-pressure accumulator, the actual speed of the motor can respond to the change of the target speed quickly, which indicates that the performance of the speed regulation system is good and the speed error is within a small range; the armature current of the motor does not exceed the maximum limited current of the system. The proposed strategy can be used to reduce the motor energy consumption, noise and brake pedal jitter when the ABS system is running.