The invention provides a wiring device for a circuit breaker online tripping and closing voltage tester and relates to the auxiliary field of voltage testing. The wiring device for the circuit breaker online tripping and closing voltage tester is composed of a first clamping ring, a second clamping ring, a first connecting plate, a second connecting plate, a roller, cutting knives, an air bag and a fastener. The first clamping ring and the second clamping ring are arranged in the air bag. The first clamping ring and the second clamping ring are respectively provided with the first connecting plate and the second connecting plate. The first connecting plate and the second connecting plate are connected through the roller. The fastener is arranged on the roller. The first connecting plate and the second connecting plate are respectively provided with one cutting knife. The wiring device for the circuit breaker online tripping and closing voltage tester has the advantages that the structure is simple, the operation is convenient, the practicality is high, two cables can be connected rapidly by the wiring device, the oxidation probability of the wiring part is reduced, the service lifetime of a line is prolonged, the maintenance difficulty is lowered, and daily work is substantially facilitated.