The invention discloses a liquid receiving tray on a nickel-plating carriage for a battery case. A liquid receiving groove is formed in a carriage frame, a gear shaft is installed along the length direction of the liquid receiving groove, a driving gear is installed at one end of the gear shaft, a chain is installed on the driving gear and connected with a sprocket assembled on a motor shaft, a driven gear is installed at the other end of the gear shaft, two ends of the gear shaft are fixed to a machine frame through rolling bearings, gear racks in meshed rotation with the driving gear and thedriven gear are installed on two borders of the liquid receiving groove, and walking wheels are installed at four corners of a bottom surface of the liquid receiving groove, and walk along with the meshed rotation of the gears and the gear racks in walking tracks. The technical scheme can guarantee that electroplating liquid scattered by a nickel-plating roller during a walking process is collected in a timely manner, ensure the cleanness of a surrounding working environment and reduce the labor intensity of cleaning personnel, thereby reducing the production cost.