The invention discloses a foldable tricycle hopper. The foldable tricycle hopper comprises a tricycle bottom plate, side plates, a front blocking plate, a rear blocking plate, and tricycle edges, wherein the tricycle bottom plate is fixed to a tricycle body; the side plates are rotatably connected to the tricycle bottom plate; each of the tricycle edges is rotatably connected to the corresponding side plate; the front blocking plate is rotatably connected to the tricycle bottom plate; the rear blocking plate is rotatably connected to the tricycle bottom plate; the rotating connection manners are all hinge connection; and supporting rods are also connected between each of the tricycle edges and the corresponding side edge. In general, the foldable tricycle hopper disclosed by the invention has the advantages of being simple in structure and convenient to use, and has extremely high using value, and the problem that the tricycle hopper is too narrow is effectively solved.