Oil-water separator

An oil-water separator relates to the technical field of oil-water separation equipment and comprises a plurality of separator units which are connected with each other, each separator unit comprises a shell, a feed port and a discharge port are formed in the side portion of each shell and located on the two opposite sides of the shell respectively, and a first partition plate and a second partition plate which are parallel to each other are arranged in each shell. The first partition plate and the second partition plate divide the shell into a feeding cavity, a separation cavity and a discharging cavity, the feeding port is communicated with the feeding cavity, the discharging port is communicated with the discharging cavity, a first water phase overflowing port is formed in the bottom of the first partition plate, a first oil phase overflowing port is formed in the top of the first partition plate, and a second overflowing port is formed in the top of the second partition plate. The height of the second ove