The invention provides a device and method for wiring of backlight wires. The device comprises a back plate, PCB adapter plates, constant-current boards and light bars. The PCB adapter plates are arranged at the rib positions of the back plate, the obverse sides of the PCB adapter plates are connected with the light bars through FFC wires, and the reverse sides of the PCB adapter plates are connected with the constant-current boards through electronic wires. According to the invention, due to the fact that the PCB adapter plates are added to the rib positions of the back plate, the connection mode of using the FFC wires is converted into the mode of using the electronic wires, manual wire bending operation is not required any longer in the production process, the operation difficulty is greatly reduced, the work efficiency is improved, and wire arrangement is more attractive.