Inspection instrument for judging crane grounding wire

The invention provides an inspection instrument for judging a crane grounding wire, which comprises an emitter and a receiver, the transmitter is arranged at at least one grounding point arranged on the crane, and the receiver is arranged at a grounding end connected with a crane body; the emitter is used for responding to a starting instruction to generate an output signal and transmitting the output signal to the grounding end through the grounding point and the vehicle body; the receiver is used for collecting the output signal received by the grounding end, verifying the output signal, and recording the signal receiving condition once after the verification succeeds; and the receiver is also used for judging whether the grounding wire is disconnected or not according to all the recorded signal receiving conditions, judging that the grounding wire is disconnected when the interval time between any two signal receiving conditions exceeds a preset time threshold value, and giving an alarm. The receiver detec