Wiring device applied to circuit breaker

The invention discloses a wiring device applied to a circuit breaker. The wiring device comprises: a shell frame, wherein the shell frame comprises a pair of longitudinal side plates parallel to eachother and a pair of transverse side plates parallel to each other, the four side plates form a frame-shaped structure in an enclosing manner, a wire penetrating opening is formed in one longitudinal side plate, and an electric wire can penetrate into the shell frame from the wire penetrating opening; a power connection piece, wherein the power connection piece comprises a contact head located in the shell frame, a connection part fixed to the outer end of the contact head and penetrating through the other longitudinal side plate, and a power connection sheet fixed to the outer end of the connection part; and a screw connected to one of the transverse side plates in a threaded fit mode, wherein the inner end of the screw extends into the shell frame. According to the invention, rapid installation and fixation of an