NOVELTY - Crude oil degradation involves collecting polluted soil sample from an oil well having a depth of 800-1000 meters and a temperature of 26-30 degrees C. The obtained soil sample is crushed, purified and filtered and is inoculated with crude oil degradation bacteria. 10 g of polluted soil sample is taken in a triangular flask having 200 ml of inorganic culture medium and shock culture is carried out at 30 degrees C at a speed of 200 revolutions per minute (rpm) on a homothermal shaker for 7 days.    USE - Method for degrading crude oil (claimed).    DETAILED DESCRIPTION - Crude oil degradation involves collecting polluted soil sample from an oil well having a depth of 800-1000 meters and a temperature of 26-30 degrees C. The obtained soil sample is crushed, purified and filtered and is inoculated with crude oil degradation bacteria. 10 g of polluted soil sample is taken in a triangular flask having 200 mL of inorganic culture medium and shock culture is carried out at 30 degrees C at a speed of 200 revolutions per minute (rpm) on a homothermal shaker for 7 days. The fresh matter is taken in a fresh inorganic culture medium for another 7 days of culture at 30 degrees C to obtain upgrading culture medium, which is mixed with fresh oil-containing inorganic salt. The culture medium is cultured for 7 days at 30 degrees C at a speed of 200 rpm to obtain naturalization culture liquid after 3 cycles of naturalization. An inoculating loop dipped in the naturalization culture liquid in sterile conditions and the flat plate of the oil-containing inorganic salt culture medium is marked. The flat plate is inverted homothermal culture case for 20 hours at 30 degrees C to obtain typical colony, and repeated lineation and purification is carried out to obtain single colony. The strain of the purified single colony is inoculated on a slant culture medium and is preserved in a refrigerator at 4 degrees C. The strain of obtained purified single colony is inoculated in the seed culture medium at 30 degrees C of temperature to obtain bacteria-suspending liquid after 24 hours of culture. 5 ml of bacteria-suspending liquid is inoculated in 50 ml of degradation liquid culture medium and shake culture is carried out for 7 days at 30 degrees C and a speed of 150 rpm. 16SrRNA is used to identify bacteria selected from Pseudomonas, Flavobacterium or Bacillus. 1 ml of bacteria-suspending liquid of Pseudomonas having a concentration of 108-109 colony forming units per ml (CFU/ml), 20 ml of bacteria-suspending liquid of Flavobacterium with concentration 108-109 CFU/ml, and 1 ml of bacteria-suspending liquid of Bacillus with a concentration of 108-109 CFU/ml are mixed adequately to prepare bacteria liquid formulation of compound bacteria. The crude oil is degraded with the compound bacteria liquid and is sprayed in the soil by using a sprayer. 2 g of magnesium sulfate, 0.5 g of copper sulfate, 0.5 g of manganese sulfate, 0.5 g of ferrous sulfate heptahydrate, and 0.5 g of calcium chloride are added to the culture medium and the moisture of the soil layer is adjusted to 20 % with local groundwater.