Power line sequence phase checking device

The utility model relates to the technical field of power detection, in particular to a power line sequence phase checking device, which comprises a first transmitting device, a second transmitting device and a signal receiving device, the first transmitting device, the second transmitting device and the signal receiving device are connected through a wireless communication technology, and adjusting assemblies are arranged at the lower ends of the first transmitting device and the second transmitting device. When line sequence checking is carried out on an electric power circuit, the contact electrode needs to be contacted with the electric power circuit, and line sequence checking is carried out by sending phase checking signals to the signal receiving device at the two ends of the electric power circuit before power transmission of the circuit so as to ensure that the phase sequence of the electric power circuit is correct before power maintenance or power transmission of a newly put-into-operation electric