Gold and silver ornament weighing device with protection function

The utility model discloses a gold and silver ornament weighing device with a protection function, which belongs to the technical field of gold and silver ornaments, and comprises a weighing device main body and a sucker assembly, the upper surface of the weighing device main body is provided with a weighing disc, and the upper surface of the sucker assembly is fixedly connected with the bottom end of a threaded column. According to the gold and silver ornament weighing device with the protection function, by arranging the suction cup assembly, the piston frame, the piston plate, a connecting shaft, a limiting rod and a limiting sleeve, the limiting rod is directly pressed leftwards, the piston plate moves leftwards in the piston frame at the moment, meanwhile, the piston frame extracts gas in the suction cup assembly, and the suction cup assembly generates negative pressure to be adsorbed to a table top; when the limiting rod moves to the position corresponding to the limiting sleeve, the limiting rod is con