A double-station cleaning system, comprising a cleaning machine, feeding frames, a guide rail assembly and a bracket assembly, wherein the feeding frames are suitable for containing to-be-cleaned workpieces; the cleaning machine is a drum-type cleaning machine, linear guide rails are arranged inside the cleaning machine, and the feeding frames are capable of walking on the linear guide rails; the guide rail assembly comprises two full-length guide rails which are fixedly arranged on the side of the lower end of a feeding inlet of the cleaning machine in an up-down parallel way; the bracket assembly comprises left and right trays, double-station connecting pieces, two tray frames, transverse plate supporting pieces, walking wheel group bases and walking wheels, the two tray frames are fixedly connected into a whole by the double-station connecting pieces, the two trays are respectively and horizontally fixedly arranged on the two tray frames, the inner left side and the inner right side of each tray are each fixedly provided with a nylon wheel base, the arrangement directions of the nylon wheel bases are the same as the directions of the linear guide rails inside the cleaning machine, each nylon wheel base is fixedly provided with a plurality of nylon wheels in a row; each tray frame is fixedly provided with an upper transverse plate supporting piece and a lower transverse plate supporting piece at positions corresponding to the two full-length guide rails, each transverse plate supporting piece is fixedly provided with a plurality of walking wheel group bases, the walking wheels are fixedly arranged on the walking wheel group bases, and the walking wheels on the upper and lower transverse plate supporting pieces are capable of sliding along the full-length guide rails; wherein the whole bracket assembly is capable of walking on the guide rail assembly in the left-right direction, and the double-station cleaning system is configured in such a way that: one of the stations is arranged for feeding, the other station is arranged for discharging, and the two stations work alternately, and the workpieces in one feeding frame are to be cleaned at one time in the working process of the system, in which the workpieces are placed into the feeding frames, the feeding frames are placed into the trays, the bracket assembly is pushed to drive the trays to move along the guide rail assembly, the feeding frame in one of the trays is conveyed to the feeding inlet of the cleaning machine, the feeding frame is pushed to move along two rows of nylon wheels and the linear guide rails inside the cleaning machine, and the feeding frame and the workpieces in the feeding frame are pushed into the cleaning machine so as to be cleaned. wherein the feeding frames are suitable for containing to-be-cleaned workpieces; the cleaning machine is a drum-type cleaning machine, linear guide rails are arranged inside the cleaning machine, and the feeding frames are capable of walking on the linear guide rails; the guide rail assembly comprises two full-length guide rails which are fixedly arranged on the side of the lower end of a feeding inlet of the cleaning machine in an up-down parallel way; the bracket assembly comprises left and right trays, double-station connecting pieces, two tray frames, transverse plate supporting pieces, walking wheel group bases and walking wheels, the two tray frames are fixedly connected into a whole by the double-station connecting pieces, the two trays are respectively and horizontally fixedly arranged on the two tray frames, the inner left side and the inner right side of each tray are each fixedly provided with a nylon wheel base, the arrangement directions of the nylon wheel bases are the same as the directions of the linear guide rails inside the cleaning machine, each nylon wheel base is fixedly provided with a plurality of nylon wheels in a row; each tray frame is fixedly provided with an upper transverse plate supporting piece and a lower transverse plate supporting piece at positions corresponding to the two full-length guide rails, each transverse plate supporting piece is fixedly provided with a plurality of walking wheel group bases, the walking wheels are fixedly arranged on the walking wheel group bases, and the walking wheels on the upper and lower transverse plate supporting pieces are capable of sliding along the full-length guide rails; wherein the whole bracket assembly is capable of walking on the guide rail assembly in the left-right direction, and the double-station cleaning system is configured in such a way that: one of the stations is arranged for feeding, the other station is arranged for discharging, and the two stations work alternately, and the workpieces in one feeding frame are to be cleaned at one time in the working process of the system, in which the workpieces are placed into the feeding frames, the feeding frames are placed into the trays, the bracket assembly is pushed to drive the trays to move along the guide rail assembly, the feeding frame in one of the trays is conveyed to the feeding inlet of the cleaning machine, the feeding frame is pushed to move along two rows of nylon wheels and the linear guide rails inside the cleaning machine, and the feeding frame and the workpieces in the feeding frame are pushed into the cleaning machine so as to be cleaned.