The invention discloses a rapid fixing tool for a circuit breaker inflating head, which comprises a first clamping mechanism, a second clamping mechanism, a first telescopic mechanism, a second telescopic mechanism and a handle, wherein the first telescopic mechanism and the second telescopic mechanism are oppositely arranged, the movable end of the first telescopic mechanism is fixedly connectedwith the middle of the first clamping mechanism, the fixed end of the first telescopic mechanism is fixedly connected with one side of the handle, the movable end of the second telescopic mechanism isfixedly connected with the middle of the second clamping mechanism, and the fixed end of the second telescopic mechanism is fixedly connected with the other side of the handle; the first clamping mechanism is matched with the second clamping mechanism, and the first clamping mechanism and the second clamping mechanism are matched with two sides of the circuit breaker inflating head respectively.According to the invention, the working time for installing the inflating head can be greatly shortened, and the working efficiency is improved; and the real-time monitoring of the SF6 gas leakage condition in the inflation process is realized by a halogen gas sensor, and the safety of operators is guaranteed.