Subway turnout switch machine fault detection device

The invention discloses a fault detection device for a subway turnout switch machine. The fault detection device comprises a central control module, a signal state acquisition module, a system anti-high-frequency interference module, an information output module, a power supply module and an auxiliary module, wherein the signal state acquisition module transmits detected field signals to the central control module, the central control module performs reverse logic processing on the detected signals through reverse logic calculation and then transmits the signals to the auxiliary module, and the auxiliary module processes the signals and then inputs the signals to the information output module. The information output module outputs the input information through processing, the system anti-high-frequency interference module mainly prevents the circuit from generating high-frequency interference on the central control module due to voltage fluctuation to improve the working stability of the system, and the power