The invention discloses a secondary wiring auxiliary apparatus. A base is provided with a support, the support is provided with an elevating mechanism and a cable transmission mechanism, and the cable transmission mechanism is arranged at the right side of the elevating mechanism; the front end of the right side of the cable transmission mechanism is provided with a cable clamping arm, the cable clamping arm comprises a top plate, two first vertical plates which are arranged in parallel at a front position and a rear position are installed below the top plate, a second vertical plate parallel to the two first vertical plates is arranged between the two first vertical plates, the first vertical plate at a rear side is externally provided with a longitudinal clamping cylinder, the free end of the piston rod of the clamping cylinder is vertically fixed on the rear side of the second vertical plate, the clamping cylinder can drive the second vertical plate to perform longitudinal movement between the first vertical plates, and the opposite surfaces of the second vertical plate and the first vertical plate at a front side are provided with recesses for clamping a cable. According to the invention, the secondary wiring auxiliary apparatus is a special-purpose auxiliary tool for secondary wiring, can automatically finish wire transmission, insertion and fixation in a terminal interface, replaces manually hand-actuated secondary wiring, improves the wiring efficiency and quality and saves manpower resources.