NOVELTY - A crude oil storage tank bottom sludge treatment comprises adding corn flour, sorghum flour, beanstalk powder, peanut straw powder, wheat straw powder, yeast and balance light calcium carbonate into LHY-15 horizontal spiral ribbon mixer, mixing to obtain first degradation agent; and adding into crude oil storage tank bottom sludge, degrading until crude oil concentration is reduced from 200 g/kg to 6.2 g/kg or less, mixing with soil and water, trapezoidally stacking, fermenting, and uniformly spraying into field.    USE - Method for crude oil storage tank bottom sludge treatment (claimed) used for petroleum industrial oil extraction engineering field.    DETAILED DESCRIPTION - A crude oil storage tank bottom sludge treatment comprises adding 7.5-9 wt.% corn flour, 7-8.5 wt.% sorghum flour, 23.5-25.5 wt.% beanstalk powder, 23.5-25 wt.% peanut straw powder, 20.5-22.5 wt.% wheat straw powder, 1-1.5 wt.% yeast and balance light calcium carbonate into LHY-15 horizontal spiral ribbon mixer, and mixing at 14 revolutions/hour for 1-2 hours to obtain first degradation agent; and adding 15-16.5 wt.% first degradation agent into crude oil storage tank bottom sludge, degrading until crude oil concentration is reduced from 200 g/kg to 6.2 g/kg or less, mixing with 20-23 wt.% soil and 8.5-10 wt.% water, trapezoidally stacking, fermenting for 15-20 days, and uniformly spraying into field. The corn flour is homemade corn flour prepared by grinding corn and sieving through 100 mesh sieve. The sorghum flour is homemade sorghum flour prepared by grinding sorghum and sieving through 100 mesh sieve. The beanstalk powder is prepared by crushing beanstalk straw having 15.5 wt.% crude protein, 2.7 wt.% crude fat and 45.8 wt.% carbohydrates contents. The crude protein comprises 1 kg of digestible protein, 82 g protein, 19 g calcium and 9 g phosphorus. The beanstalk straw crude protein content is 17.5 times the pea seedlings and 8 times of the rice straw. The 1 kg rice straw has equivalent seedling energy to 0.7 kg barley. The wheat straw powder is prepared by crushing wheat into powder. The yeast is undecomposed industrial yeast. The light calcium carbonate is 1-5 mu m industrial light calcium carbonate having spindle, cubic, needle, chain, spherical or sheet shape.