The invention discloses a wiring mechanism of a low-voltage electrical appliance. The wiring mechanism comprises a junction box shell, and a connecting line module and a fixing line module are arranged in the junction box shell, wherein the connecting line module comprises a locking screw, and a sealing structure is arranged on the locking screw, the fixing line module comprises a clamping threading column and a grounding screw, and a current-carrying bridge is arranged between the clamping threading column and the grounding screw. A fastening screw is arranged on the clamping threading column, and a sealing structure is also arranged on the grounding screw, and a wire breaking structure is arranged between the connecting line module and the fixing line module. The wiring mechanism is simple in structure and has a sealing and guiding effect on wiring operation. The wiring and fixing operation of an electric wire can be guided, and excessive large resistance due to electric wire pilingduring wiring can be prevented, thereby protecting the electric wire. The sealing structure can prevent electric leakage of the electric wire. The wire breaking structure is additionally arranged to limit and peel wires of different lengths. The operation is convenient, and the wiring mechanism is worthy of promotion.