The invention relates to a cleaning device for the air-jet loom needle groove which comprises a sliding block which is slidingly disposed on the guide rail of the air-jet loom, a dust-collecting tube with one end connected with a vacuum cleaner and the other end connected with the sliding block, and an air blowpipe with one end connected with an air pump and the other end connected with the sliding block. The sliding block is provided with a dust-gathering tank which is close to the air blowpipe opening and the dust-collecting tube opening. When in use, one end of the dust-collecting tube is connected with the vacuum cleaner; and one end of the air blowpipe is connected with the air-blowing pump; thus, the air blowpipe blows the dust in the air-jet loom needle groove into the dust-gathering tank; then the dust-collecting tube collects the dust the vacuum cleaner. Compared with the current technology, the cleaning device of the invention is convenient in use and highly effective in cleaning.