In view of the deficiency of the motor controller of the middle size soccer robot, a double closed loop DC motor controller based on F2808 DSP is designed. The architecture of the controller and the structure of the circuit are introduced in detail, and the working process of the double closed-loop of the controller is also analyzed. In order to reduce the heat the motor produced, a choke is integrated to restrain the swing of the current. And the current control effect is tested by experiment. The experimental results show that this controller can control the current of the motor armature and reduce the heat the motor produced effectively to protect the motor to work more reliably in the safety area.