Motor shaft insulation performance testing device

The utility model relates to the technical field of motor shaft testing, in particular to a motor shaft insulating property testing device which comprises an upper cover and a lower seat which are combined in a split mode, and cavities matched with a motor shaft to be tested in appearance are formed in the combined faces of the upper cover and the lower seat respectively. The cavity surface of the upper cover and the cavity surface of the lower seat are respectively provided with a plurality of conducting strips, the upper and lower conducting strips are correspondingly combined and wrap insulating coatings on the motor shaft, the upper cover is provided with a lap joint assembly, the lap joint assembly comprises a contact column and a first wire, the contact column abuts against the uncoated surface of the motor shaft, and the first wire is connected with the contact column. The first wire is electrically connected with the contact column, the lower seat is provided with a second wire, the second wire is ele