The utility model discloses an oil dewatering device, comprising a machine body, and a dewatering drum. The oil dewatering device is characterized in that the machine body is a cylinder; an oil inlet pipe is arranged in the middle above the machine body; two or more concentric filter drums are distributed inside the dewatering drum; each filter drum is of a single-layer barrel structure; filters are fully distributed between the filter drums; an annular oil receiving tank is arranged at the bottom part of the machine body; the outer ring of the oil receiving tank is greater than that of the rotary drum; the oil receiving tank is arranged between the inner wall of the machine body and the outer wall of the dewatering drum; and the bottom part of the oil receiving tank is flush to the bottom inner layer of the machine body. The oil dewatering device is high in work efficiency, clean and sanitary, and better in dewatering effect, and dewaters the oil under a low-temperature environment.