The utility model discloses a slit-adjustable cigarette self-cleaning guide pipe for a cigarette making machine, which comprises a branch pipe body, the branch pipe body is made of steel, the right end of the branch pipe body is provided with a mounting connector, the left end of the branch pipe body is provided with a cigarette outlet nozzle, and the tops of the branch pipe body and the cigaretteoutlet nozzle are provided with strip-shaped slits; an air storage housing is fixed to the bottom of the branch pipe body, a sealed air storage cavity is formed between the air storage housing and the bottom of the branch pipe body, and a plurality of vent holes communicated with the air storage cavity are formed in the bottom of the branch pipe body. Wherein an arc-shaped cover is arranged on the branch pipe body in a matched mode, the arc-shaped cover is buckled on the branch pipe body, a magnetic block is embedded into the edge of the arc-shaped cover, and a strip-shaped through hole is formed in the middle of the arc-shaped cover. Through the arrangement of the multiple vent holes in the branch pipe body, residual cigarettes in the branch pipe body can be blown out quickly and simultaneously, the blown residual cigarettes automatically fall into the cigarette collecting funnel below, the operation can be completed without opening an equipment housing, and the operation is simple and the efficiency is high.