The utility model aims to provide a residual current protector testing device which comprises knife switches, fuse protectors, zero-sequence transformers, circuit breakers ZD47-32A, bottom plates of power distribution boxes and ten binding posts. Ten through holes which are used for being fixedly connected with the ten binding posts are formed in the bottom plates of the power distribution boxes, the binding posts are fixedly connected onto the bottom plates of the power distribution boxes in a threaded manner, fixing grooved plates are arranged on box plates on the front sides of box bodies of the power distribution boxes and are positioned on the upper sides of the bottom plates of the power distribution boxes, and the knife switches, the fuse protectors, the zero-sequence transformers and the circuit breakers ZD47-32A are sequentially equidistantly arranged on the fixing grooved plates from top to bottom and are electrically connected with the binding posts. The residual current protector testing device has the advantages that the residual current protector testing device is high in safety performance, and good personal safety protection effects can be realized; residual current testing protection can be completely implemented on the front sides of the box bodies of the power distribution boxes, accordingly, a safety factor can be increased, electric components at the rears of power distribution boards can be prevented from being in contact with one another, and casualties due to electric shock can be reduced.