Detection device for online gas supply of circuit breaker

The invention relates to a detection device for online gas supply of a circuit breaker. The detection device comprises a body, wherein four pipelines are arranged in the body, two of the four pipelines are communicated with a connecting pipe and an air supply pipe, the other two pipelines are connected with an exhaust pipe and a detection pipe respectively, and a near-end air supply valve and a far-end air supply valve are arranged on the two pipelines communicated with the connecting pipe and the air supply pipe respectively. By implementation of the technical scheme, the circuit breaker can be supplied with gas in a state without power failure, and gas detection and a micro water test work can be carried out by using the detection device provided by the invention, so that the maintenance work is relatively safe, simple and convenient, the operation times are reduced, the running safety factor is improved, the working efficiency is improved, and not only is the economic loss of an enterprise reduced, but also continuous and reliable electric energy is provided for users.