Train pull-in detection device circuit

The utility model provides a train pull-in detection device circuit. Comprising a main control chip module, a relay module used for sending out an alternating current signal, a photoelectric sensor module used for controlling the relay module to be powered on to send out the alternating current signal when it is detected that a train enters a station, and a signal conversion module used for receiving the alternating current signal and converting the alternating current signal into a high-level signal. The communication module is used for receiving a control data signal sent by the control terminal and sending the control data signal to the main control chip module, and receiving a train pull-in data signal sent by the main control chip module and sending the train pull-in data signal to the control terminal; the power supply module is used for providing a required power supply for each module; wherein the signal output end of the signal conversion module is electrically connected with the signal input end of