Disclosed is an electricity-stealing-prevention checking device. During electricity-stealing-prevention testing, a tester usually utilizes a voltmeter for checking whether or not someone steals electricity through an undervoltage method or a phase shifting method; during testing, voltage of the meter front of an electricity meter needs to be tested by the voltmeter, then voltage at the meter tailof the electricity meter is tested by the voltmeter, finally the voltage of the meter front and the voltage of the meter tail are compared for calculation, and whether or not the electricity is stolenis speculated. An existing voltmeter or multimeter is traditional in design, the operation for electricity-stealing-prevention electricity meter detection is very inconvenient, and the electricity-stealing-prevention working efficiency is lowered. The electricity-stealing-prevention checking device comprises a track rod (2), the track rod is sleeved with two sleeves (3), the sleeves are connectedwith voltmeters (1) through connecting rods (4), measuring rods (5) are connected to positive and negative electrodes of the voltmeters, and measuring heads (7) are welded to the measuring rods. Theelectricity-stealing-prevention checking device is used for electricity-stealing-prevention checking.