Material selecting structure

The utility model provides a material selecting structure. The material selecting structure comprises a material selecting shell, at least two switch valves, an ejector rod, a driving piece, at least two first induction pieces and a second induction piece. At least two feed ports of the sorting shell are arranged in the circumferential direction of a preset positioning circumference; the at least two switch valves are arranged in the at least two feed ports in a one-to-one correspondence manner; the ejector rod is rotatably arranged in the material cavity, and the rotating axis of the ejector rod coincides with the central axis of the preset positioning circumference; the power output end of the driving part is connected with the ejector rod, and the ejector rod is driven to rotate to abut against any switching valve so that the switching valve can be in an open state, or the ejector rod is driven to rotate to release the switching valve so that the switching valve can be in a closed state. The at least two f