NOVELTY - Preparation and application for composite microbial product-tube bacteria alarm capable of cleaning dirty and unusual smell in draining pipeline comprise taking Rhodopseudomonas palustris, Bacillus subtilis natto and Saccharomyces cerevisiae to prepare the composite microbial product-tube bacteria; and putting the prepared bacteria in kitchen, washing basin, and draining pipeline every 1-2 weeks for one time, and putting 5-7 particles for one time.    USE - Preparation method and application for composite microbial product-tube bacteria capable of cleaning dirty and unusual smell in draining pipeline.    ADVANTAGE - The three microorganisms can continuously propagate and distribute to each corner in the pipeline after meeting water. The unusual smell in the pipeline can be decomposed and dissolved in the liquid phase. The unusual smell components absorbed by the microorganisms can be adopted as energy and nutrient substance during metabolic process of the microorganisms to be decomposed, and then converted into harmless compounds through biochemical reaction. The organic dirt in the pipeline can be decomposed as ammonia and nitrogen by the Bacillus subtilis natto through the ammoniation. The ammonia, the nitrogen and the hydrogen sulfide gas in the pipeline can be adopted as the nitrogen nutrient source and the hydrogen donor for the Rhodopseudomonas palustris, and the bacterial strain can be used for propagating. The Rhodopseudomonas palustris and the Saccharomyces cerevisiae can secrete lipase so as to realize the actions of removing the dirty and the unusual smell, dredging the pipeline and keeping the cleanness in the pipeline.    DETAILED DESCRIPTION - Preparation and application for composite microbial product-tube bacteria alarm capable of cleaning dirty and unusual smell in draining pipeline comprise: (A) obtaining Rhodopseudomonas palustris whose bacterial strain content is 30x 108 cfu/ml for use; (B) obtaining graft copolymer of starch-acrylamide, adding water to dissolve, diluting to ten times, sterilizing after prepared as 10% liquid for use; (C) obtaining sodium carboxymethylcellulose, adding water to dissolve, diluting to ten times, sterilizing after prepared as 10% liquid for use; (D) adding 2% of the liquid which is completely dissolved in the step (B) to the liquid in the step (A), and uniformly stirring for 10 minutes; (E) adding 3% of the liquid which is completely dissolved in the step (C) to the liquid in the step (D), and uniformly stirring for 10 minutes; (F) putting to a centrifugal machine after the bacteria liquid produces the bacteria flocculate matters so as to centrifugally separate the liquid supernatant from the concentrated flocculate matters, removing the liquid supernatant, utilizing ultra-filtration membrane plate frame type filter press to remove excess water, obtaining concentrated pasty Rhodopseudomonas palustris whose bacterial strain content is 30x 108 cfu/ml for use; (G) obtaining 80 mesh screen powder to screen the Bacillus subtilis natto whose bacterial strain content is 10x 108 cfu/g for use; (H) obtaining the 80 mesh screen powder to screen the Saccharomyces cerevisiae whose bacterial strain content is 10x 108 cfu/g for use; (I) obtaining the 80 mesh sieve to screen kaolin for use; (J) obtaining the 80 mesh sieve to screen attapulgite for use; (K) obtaining polyanionic cellulose (PAC) for use; (L) obtaining water to dissolve; sterilizing after prepared as 2% liquid for use; (M) mixing the liquids in the steps (F)-(H) at a ratio of 1 : 1 : 1, and uniformly stirring for use; (N) mixing the liquids in the step (M) and the step (I) at a ratio of 1 : 1, and uniformly stirring for use; (O) mixing the liquids in the step (J) and the step (N) at a ratio of 3 : 97, and uniformly stirring for use; (P) mixing the liquids in the step (L) and the step (O) at a ratio of 1 : 9, uniformly stirring, preparing as particles, drying, installing to an aluminum foil bag to obtain the composite microbial product-tube bacteria; and (Q) putting the liquid in the step (P) in the kitchen, the washing basin, and the draining pipeline every 1 to 2 weeks for one time, and putting 5 to 7 particles for one time.