Circuit breaker bimetallic strip assembly structure and circuit breaker

The utility model relates to the technical field of circuit breakers, in particular to a circuit breaker bimetallic strip assembly structure and a circuit breaker, and aims to solve the technical problem that in the prior art, bimetallic strips used on circuit breakers are insufficiently heated. According to the technical scheme, the circuit breaker bimetallic strip assembling structure comprises a bimetallic strip, the first end of the bimetallic strip in the length direction is a fixed end, and the second end of the bimetallic strip in the length direction is a free end; the fixing piece is made of a metal material and is suitable for guiding current to flow from the A end to the B end, and a first mounting piece is formed in at least partial area of the fixing piece; the part, close to the B end, of the first mounting piece is fixedly connected with the first end of the bimetallic strip, the part, close to the A end, of the first mounting piece is attached to or forms a preset gap with the middle area in t