Folding cart with adjustable space size

The utility model discloses a folding cart with adjustable space size, which comprises a placing box, an extension plate, an insertion rod, a pull rod and a positioning block, the extension plate is arranged in the placing box, the extension plate is movably connected in the placing box, the surface of the extension plate is provided with a plurality of adjusting grooves, and the adjusting grooves are uniformly distributed on the surface of the extension plate. The placement box is movably connected with the extension plate through an insertion rod, a positioning block is fixedly connected to the surface of the placement box, and a positioning cavity is formed in the positioning block. According to the foldable cart capable of adjusting the space size, the containing box, the extension plate, the insertion rod, the pull rod, the positioning block, the adjusting mechanism and the positioning mechanism are arranged and used in cooperation, the purpose that the cart pushing capacity is limited and cannot be impr