Automatic feeding device

The utility model discloses an automatic feeding device. The automatic feeding device comprises a feeding bin, wherein injection molding bearing seats are installed on the two sides of the lower portion of the feeding bin through shafts, T-shaped supports are connected to the n injection molding bearing seats, an arc-shaped door is fixedly installed on one of the other two stand bars of each T-shaped support, a cross rod is installed on the other one of the other two stand bars of each T-shaped support in a hinged mode, an air cylinder is installed on the outer wall of the feeding bin in a hinged mode, a piston rod of the air cylinder is hinged to the cross rods, and a pipeline is led out of the side wall of the feeding bin. The automatic feeding device is small in size, small in occupied space, and capable of feeding irregular materials and being connected with other auxiliary devices, and both the feeding precision and the feeding speed can be guaranteed through two different feeding modes.