The invention discloses a heat dissipation device for power conversion equipment, which comprises a box body, a box door, power conversion equipment, a refrigerating device, an air blowing device, a temperature sensor and a controller. The box door is hinged to one side of the box body, the power conversion equipment is arranged in the box body, the refrigerating device is arranged on one side ofthe power conversion equipment, the air blowing device is arranged on the side, away from the box door, in the box body, and the temperature sensor and the controller are both arranged in the box bodyand installed on the inner wall of the box body. Thus, the temperature sensor senses heat generated when the power conversion equipment in the box body works and feeds back the heat to the controller, the controller controls the air blowing device and the refrigerating device to work through different signals, the power conversion equipment is cooled, the power conversion equipment works at the constant temperature, and therefore the service life of the power conversion equipment is prolonged.