Petroleum storage tank

The utility model relates to the technical field of oil storage tanks, in particular to an oil storage tank which comprises a first tank body and a second tank body, supporting assemblies are fixedly connected to the left side and the right end of the bottom end of the first tank body, a water tank is fixedly connected between the two supporting assemblies, and the second tank body is located in the first tank body. A cooling cavity is formed between the first tank body and the second tank body, a water pump is installed at the top end of the water tank, the input end of the water pump communicates with the bottom side in the water tank, the output end of the water pump communicates with the interior of the cooling cavity through a water inlet pipe, and the top end of the water tank is fixedly connected with multiple rows of heat dissipation boxes; according to the oil storage tank, water flowing in the first tank body and the second tank body is in an internal circulation state, water is prevented from being