The utility model discloses a folding cabinet convenient to assemble. Folding cabinet entirety, a top plate is welded to the top of the whole folding cabinet. clamping grooves are formed in the innersurfaces of the left side panel and the right side panel; partition plates are arranged in the clamping grooves. The bottom of the left side panel and the bottom of the right side panel are welded tothe bottom plate. Grooves are formed in the upper and lower positions of the front and rear portions of the surface of the left side panel, sliding grooves are formed in the grooves, sliding blocks are clamped in the sliding grooves, connecting pieces are welded to the outward sides of the tops of the mounting bases, fixing bases are arranged on the upper and lower positions of the front and rearportions of the surface of the right side panel, and inserting grooves are welded to the right sides of the fixing bases through the connecting pieces. According to the folding cabinet convenient to assemble, the partition plates are arranged to be of the pull-out type disassembling structures, the pull-out type disassembling structures are convenient to assemble, the positions of the partition plates can be adjusted conveniently according to the needed height, the inserting grooves and the inserting pieces are arranged on the front surfaces and the rear surfaces of the side face plates, and connection and folding use can be achieved according to needs.