Switching power supply parallel power supply system and numerical control power supply

The utility model provides a switching power supply parallel power supply system, which relates to the technical field of power supplies and comprises a controller, two parallel synchronous BUCK topological structure circuits, a current acquisition module and a voltage acquisition module. The input ends of the two parallel synchronous BUCK topological structure circuits are connected with the controller, and the output ends of the two parallel synchronous BUCK topological structure circuits are connected with a load; the current acquisition module acquires the output current of the two parallel synchronous BUCK topological structure circuits and transmits the output current to the controller; the voltage acquisition module acquires the voltage at the two ends of the load and transmits the voltage to the controller. According to the utility model, two parallel synchronous BUCK topological structure circuits are adopted as the high-efficiency DC-DC conversion circuit, and the peripheral feedback circuit control