Feeding mechanism of packaging machine

The utility model discloses a packaging machinery feeding mechanism which comprises a bottom plate, an overturning frame and a transmission wheel, a fixing frame is fixed on one side of the top end of the bottom plate, rotating frames are installed on the two sides of the fixing frame, the overturning frame is fixed on one sides of the rotating frames, supporting rollers are fixed in the overturning frame, and a limiting structure is arranged at the top end of a conveying belt. And the tensioning structure comprises a connecting frame, a threaded rod, a nut, a telescopic spring, a guide roller, a roller frame and a push roller, the connecting frame is fixed to the bottom end of the overturning frame, and the threaded rod is inserted into the connecting frame. The telescopic spring pushes the roller frame to move, the push roller pushes the conveying belt to be bent so that the conveying belt can be tightened, the position of the threaded rod is moved by rotating the nut, the position of the push roller and th