The utility model relates to a control valve of a closed-loop bidirectional variable pump. The control valve consists of a main valve and two control valves, wherein the control valves are respectively connected with the two ends of the main valve, the main valve comprises a main valve body, a slide valve, an eccentric shaft, a feedback lever, a left spring pull rod, a right spring pull rod and a tension spring, the slide valve is arranged in the main valve body along the X-axis direction, the eccentric shaft is arranged in the main valve body along the Y-axis direction, one end of the eccentric shaft extends out of the main valve body, the feedback lever is arranged in the main valve body along the Z-axis direction, the lower end of the feedback lever extends out of the main valve body, the eccentric shaft is positioned under the slide valve and penetrates through a hole of the middle part of the feedback lever, the left spring pull rod and the right spring pull rod are matched with the eccentric shaft, the two ends of the tension spring are respectively hooked at the upper ends of the left spring pull rod and the right spring pull rod, the eccentric shaft is of a four-stage step cylindrical structure, the third-stage cylinder is matched with the hole of the middle part of the feedback lever, and the lower end of the feedback lever is connected with a control piston of the closed-loop bidirectional variable pump. The control valve has the advantages that the pump can be remotely controlled by less hydraulic fluid or a direct current power source; under the condition of no replacement of the main valve, only the control valves are replaced, and the switching between hydraulic control and electric control is realized.