Design for improving assembly threading efficiency of miniature circuit breaker

The invention provides a design for improving the assembly threading efficiency of a miniature circuit breaker, which comprises at least two single-pole miniature circuit breakers and circuit breaker shells, wherein each single-pole circuit breaker shell comprises a wire inlet end face (1), a wire outlet end face (2), a wire inlet fastening screw end face (3) and a wire outlet fastening screw end face (4); at least one of the wire inlet end face (1), the wire outlet end face (2), the wire inlet fastening screw end face (3) and the wire outlet fastening screw end face (4) is provided with a threading through hole (5), and the number of the threading through hole (5) is at least one. Meanwhile, a wiring groove and a wiring groove cover are arranged at corresponding positions, so that a complete technical scheme is formed. The design has the advantages that in the assembling process of the multi-pole miniature circuit breaker, each single-pole element connecting line is led out of the shell from the threading th