Crude oil storage tank cleaning device

The utility model discloses a crude oil storage tank cleaning device which comprises a bottom plate, one end of the upper surface of the bottom plate is fixedly connected with a vertical plate, the middle of the upper surface of the bottom plate is rotationally connected with a rotating disc, two arc-shaped plates are arranged above the rotating disc, and the rotating disc is provided with an adjusting assembly used for driving the two arc-shaped plates to be close to or away from each other. The storage tank is fixed to the rotary disc, then the two supporting arms are attached to the side wall of the storage tank at the same time under the elastic force of the elastic assembly till the cleaning roller and the scraper make contact with the side wall of the storage tank, the first motor drives the cleaning roller to rotate, meanwhile, an external water source is opened, water is sprayed out of the water spraying pipe to the surface of the storage tank, and the rotary disc is rotated to drive the storage tank