NOVELTY - Method of using microorganisms for degrading crude oil and for transporting oil through pipelines, involves preparing bacterial fluid by mixing Pseudomonas sp. strain G3, Bacillus sp. strain B5 and Corynebacterium sp. strain Y2, preparing a nutrient solution by mixing (in %): an adhesive (0.1-5) and dipotassium hydrogen phosphate (0.001-5) in water, combining bacterial and nutrient solutions and mixing the suspension with crude oil and incubating for 70-220 hours at 35-70 degrees C, and passing the obtained liquid through the pipelines.    USE - The method is useful for degrading congealable and highly viscous crude oil using microorganisms and for transporting oil through pipelines (claimed).    ADVANTAGE - The method is simple and enables effective degradation of crude oil.    DETAILED DESCRIPTION - Method of using microorganisms for degrading crude oil and for transporting oil through pipelines, involves (a) preparing a bacterial fluid by mixing Pseudomonas sp. strain G3, Bacillus sp. strain B5 and Corynebacterium sp. strain Y2 in the ratio of 1-6:2-5:2-4, where the concentration of the bacteria is 106-109/ml and the pH of the bacterial culture is 4.0-8.0, (b) preparing a nutrient solution by mixing (in %): an adhesive (0.1-5%), ammonium sulfate (0.1-1), magnesium sulfate heptahydrate (0.001-0.2%) and dipotassium hydrogen phosphate (0.001-5) in water, (c) combining the bacterial culture and the nutrient solution in a ratio of 1:2-40, and (d) mixing the prepared suspension with the crude oil in the ratio of 1-5:1 and incubating the mixture in the presence of microorganisms at 35-70 degrees C for 70-220 hours with a constant stirring rate of 1-600 rpm, and then transferring the crude oil suspension through pipes, where the water content of the crude oil suspension is controlled within 1-10% and the temperature at which the crude oil suspension is passed through pipes is higher than the solidifying point of the crude oil by 1-10 degrees C. The portion of degraded crude oil suspension, after passage through the pipelines, is collected to a jar, where the volume ratio of the pumped-back crude oil suspension and the crude oil in the jar is 1:4-20. The pumped-back crude oil contains large amount of bacteria, which is then recycled to obtain the bacterial fluid.