A feeding system comprises a hopper adapted to accommodate a plurality of different types of products, a conveyor belt positioned above the hopper and configured to convey the products, and a lifting mechanism adapted to lift the products in the hopper onto the conveyor belt. The lifting mechanism includes a transferring belt circulating around an annular path and a plurality of step plates evenly spaced along the annular path. The step plates are adapted to carry one or more of the products and the transferring belt is configured to drive the step plates to circulate around the annular path so as to lift the products from the hopper onto the conveyor belt.