An unloading and feeding device can include a driving mechanism, a mounting member, two elastic assemblies, a rotating assembly, a pressing member, and a picking member. The driving mechanism can include a base plate having an edge, a movable assembly coupled to the base plate, a first limiting member coupled to the base plate adjacent to the edge, and a second limiting member coupled to the base plate away from the edge. The first limiting member and the second limiting member are positioned at opposite sides of the base plate. The mounting member can be coupled to the movable assembly. The elastic assemblies can be positioned at opposite sides of the movable assembly, corresponding to the first and second limiting members respectively. Each of the elastic members can include a movable member extending through the mounting member.