The present invention relates to a foldable trolley having a trolley frame and a flexible fabric bag or the like. The invention is characterized by its unique design that includes a light weight structure, a large supported space and can be conveniently folded and unfolded. The trolley can alternatively be folded into a flat structure to save storage space or put into a car trunk for shopping or for the temporary transporting of goods. In this structure, both sides of the handhold U frame are directly hinged to the lower frame. The motive force can be directly transmitted to the lower frame. The overall shape appeals to the public aesthetic sense; and moreover, the hinge point between the handhold U frame and lower frame is the center for unfolding and folding, and thus has a smoother operation.