The mechanical cleaning equipment of crude oil storage tank is aimed at the change of the storage volume of crude oil after the sedimentation of the sludge at the bottom of the crude oil storage tank, and the quality of crude oil affects the sales price, etc., and the sludge at the bottom of the oil tank needs to be recovered and reprocessed, and then the internal cleaning and garbage cleaning of the crude oil storage tank needs. We provide tank cleaning systems for sludge recovery and inner wall cleaning of crude oil storage tanks, refined oil storage tanks and many closed containers.