The utility model discloses a folding trailer which is a vehicle with new structure used for carrying and transporting the instruments of the labour in the working on the garden or the field, belonging to a tool vehicle. The folding trailer comprises a left baffle plate 4, a baffle plate 6, a front baffle plate 5, and a back baffle plate 9. The trailer wheels are arranged on the lower side of the trailer. The utility model is characterized in that: the trailer bottom is composed of a left bottom plate 12 and a right bottom plate 11 which are connected by a hinge 3; two handle bars 2 are respectively inserted in the jacks 7 of the handle bar on the front end of the left baffle plate 4 and the baffle plate 6; a connecting tube 1 of the handle bar are inserted between the front ends of the handle bars 2. The utility model has the advantages that: the structure is more reasonable; the folding trailer can be folded to reduce the volume in packaging, and the volume of the packing box is reduced; the packaging cost is reduced; the occupying space can be decreased in the transportation process; the transportation cost is saved.