Wave damping device of ship model towing tank

The invention provides a wave damping device of a ship model towing tank. The wave damping device comprises a connecting and lifting mechanism and a floating ball chain; the connecting and lifting mechanism comprises a left part and a right part, and each part adopts a structure as follows: a lifting stepping motor is fixed on a bodywork connecting plate, an output shaft of the lifting stepping motor is connected with a lifting screw rod through a lifting gearbox, two ends of the lifting screw rod is installed on the bodywork connecting plate through bearing housings, a position adjusting plate is installed on the lifting screw rod through threaded holes, a connecting rod is fixed on the position adjusting plate, and the lifting stepping motor is connected with a controller; and the floating ball chain comprises floating balls and a connecting chain, all floating balls constitute the floating ball chain through the connecting chain, and two ends of the floating ball chain are connected to the connecting rod o