Overload alarm non-tripping device and circuit breaker

An overload alarm non-tripping device comprises a support opposite to a bimetallic assembly, a microswitch is fixedly assembled on the support, a push rod is arranged between the microswitch and the bimetallic assembly, the first end of the push rod is connected with the movable end of the bimetallic assembly in an inserted mode, and the second end of the push rod is connected with the movable end of the bimetallic assembly. The side face of the second end of the push rod is driven by the bimetallic assembly to be in sliding fit with the microswitch, a trigger part is arranged on the side face of the second end of the push rod, and when an overload fault occurs, the trigger part slides to press the button so as to switch the state of the microswitch. The circuit breaker comprises a shell, at least one group of bimetallic components are arranged in the shell, and the overload alarm non-tripping device is arranged in the shell. The push rod is of an integrated structure, the first end of the push rod is connect