Mahjong machine with circuit protection function

The utility model discloses a mahjong machine with a circuit protection function. The mahjong machine comprises a mahjong machine mainboard and a sensor used for inputting an induction signal to the mahjong machine mainboard. The mahjong machine also comprises a switch circuit and a power supply detection circuit, wherein the power supply output end of the mahjong machine mainboard is used for supplying power to the sensor through a switch circuit, the first signal output end of the mahjong machine mainboard is used for sending a first control signal to the switch circuit, the power supply detection circuit is used for detecting the input voltage of the sensor, and when the sensor is short circuited, the mahjong machine mainboard is used for sending the first control signal to the switch circuit. The utility model has the beneficial effects that when the sensor is short circuited, a power supply of the sensor can be cut off, the service life of the sensor is prolonged and the energy resources are saved, a pro