Circuit breaker mounting rack

The utility model relates to the technical field of circuit breaker mounting racks, in particular to a circuit breaker mounting rack, which comprises a bottom plate, a guide rail mechanism with a detachable function is arranged on the bottom plate, a circuit breaker is arranged on the guide rail mechanism, a bearing block capable of being pushed is arranged on the guide rail mechanism, the bearing block drives two groups of clamping plates, and two groups of clamping heads are continuously extruded by a plurality of grooves. When the circuit breaker is moved to a proper position, a clamping head slides into a groove under the action of rebound force of a spring, so that the position of the circuit breaker is pre-positioned on a guide block, then a convex shaft is rotated, two groups of convex parts on the convex shaft extrude two groups of sliding strips, the sliding strips push a clamping plate through the clamping head, and the clamping plate moves along a first groove; when the clamping plate is attached t