Railway signal relay contact state judgment circuit

The invention relates to a railway signal relay contact state judgment circuit, which belongs to the technical field of relays, and comprises a relay socket, an isolation input module, a state setting module and a state acquisition judgment module, the relay socket is connected with the isolation input module and the state setting module, the isolation input module is connected with the state setting module, and the state acquisition judgment module is connected with the state acquisition judgment module. The isolation input module is responsible for isolating and converting the level of each pin of a relay to be tested, the state setting module is connected with the state acquisition and judgment module, and the state setting module is responsible for setting the state of the relay to be tested and outputting a corresponding signal to the state acquisition and judgment module according to a signal of the isolation input module; and the state acquisition and judgment module receives the signal transmitted by