The invention relates to a device for starting underwater robot equipment in a wireless remote control mode. An opto-isolator driving circuit receives I/O control signals sent by a control module connected with the opto-isolator driving circuit, carries out isolation and amplification on the control signals and then controls the internal related equipment of an underwater robot to start or stop. One end of an isolation type DC-DC power source converter is connected with the control module and supplies power to the control module, and the other end of the isolation type DC-DC power source converter is connected with the opto-isolator driving circuit and provides output driving voltage for the opto-isolator driving circuit. A CAN communication circuit is connected with the control module and achieves CAN bus communication between the control module and other equipment. One end of a serial port communication circuit is connected with the control module, and the other end of the serial port communication circuit is connected with a wireless radio station. External control signals are received through the wireless radio station and then sent to the control module to be analyzed, and meanwhile corresponding motion information of the driving circuit and instruction information of CAN communication are fed back. The device has the characteristics of being simple in structure, small in power consumption, large in operation distance and the like, and the convenience of operation of starting or stopping the internal equipment of the underwater robot is greatly improved.