The invention provides a frame weighing system. The frame weighing system comprises a conveying device which is laid in the working area provided with the frame weighing system to form a conveying track, a frame to be weighed which is arranged in the conveying track and is conveyed along the conveying track, an identification module which is fixed on the side of the frame to be weighed and is provided with an identification code corresponding to the frame to be weighed, a weighing platform which is arranged below the conveying track and detects the mass of the frame to be weighed when the frame to be weighed is conveyed in the conveying track, and a scanning module which is fixed on one side of the conveying track and transmits an identification signal to the conveying track to scan the identification code on the identification module. The frame weighing system provided by the technical scheme can automatically weigh materials, and is rid of the influence of man-made operation on the measurement accuracy.