Over-current prevention device of radio frequency matcher

The utility model discloses an over-current prevention device of a radio frequency matcher. The motor comprises a motor circuit and a power supply optimization circuit, the motor circuit is provided with a motor, a resettable fuse and a circuit board power supply interface, two ends of the resettable fuse are respectively provided with a heat-shrinkable sleeve, one end of the resettable fuse is connected with the motor interface through the heat-shrinkable sleeves, and the other end of the resettable fuse is connected with the circuit board power supply interface through the heat-shrinkable sleeves; the power supply optimization circuit is connected with the motor circuit through a circuit board power supply interface and comprises a power supply, a power circuit and a signal control circuit, the power circuit and the signal control circuit are connected with a triode and connected with the circuit board power supply interface through the triode, and a heat dissipation aluminum block is arranged on the back f