Folding shelf

The utility model provides a folding type shelf which comprises a main support, supporting pieces and side supports, the front side of the main support is transversely hinged to at least three supporting pieces which are vertically arranged at intervals, the hinged axis of the supporting pieces is a horizontal line, and each supporting piece has a folding storage state and an unfolding storage state which can be rotationally switched. The left end and the right end of the main support are vertically hinged to two oppositely-arranged side supports, the hinge axis of the side supports is a vertical line perpendicular to the horizontal line, the two side supports are contained on the supporting pieces in a foldable mode through rotation or support the two ends of the supporting pieces in an expandable mode respectively, and except for the supporting piece on the topmost layer or the bottommost layer, the two side supports can be folded or unfolded. The two ends of the other supporting pieces are movably connecte