Mounting structure of circuit breaker

The utility model discloses a mounting structure of a circuit breaker, which comprises a circuit breaker base and a fixing frame, the circuit breaker base is provided with a plurality of mounting grooves matched with the fixing frame, the fixing frame comprises a first fixing frame, a second fixing frame and a U-shaped frame, and the first fixing frame is fixedly connected with the second fixing frame through the U-shaped frame. Clamping blocks are arranged at the bottom of the first fixing frame, the bottom of the second fixing frame and the bottom of the U-shaped frame, clamping grooves are formed in the positions, opposite to the clamping blocks, in the mounting groove, and the clamping blocks are matched with the clamping grooves. According to the utility model, the clamping block is clamped with the clamping groove, so that the fixing frame is fixed, and the positioning column and the positioning hole are arranged, so that the fixing frame is positioned in the mounting groove, and the deviation of the mo