Lift safety detecting device

The invention relates to the technical field of lifts, in particular to a lift safety detecting device. The lift safety detecting device comprises a pit detecting device arranged in an lift pit, a main control plate arranged on the top of a liftway and a floor control plate arranged on a lift floor. The floor control plate is connected with the main control plate through a communication cable. The lift safety detecting device is characterized in that the pit detecting device is connected with the floor control plate through a detecting cable; and the floor control plate sends warning signals to the main control plate when the pit detecting device detects an abnormal state. The warning signals are sent through the lift floor control plate, and the lift floor control plate is in communication with the main control plate, so that the structures of the liftway and the main control plate are simplified, and the processing burden of the main control plate is relived. The wiring cost caused by direct connecting of the pit detecting device with the main control plate is avoided.