The invention discloses an oil-containing waste water treatment device. The oil-containing waste water treatment device comprises a rotational-flow rough filter (1), and is characterized in that a water outlet of the rotational-flow rough filter (1) is connected with the upper part of a fine filter (3) by virtue of a communication pipe (2), an inner cavity of the fine filter (3) is internally provided with two layers of closed supporting plates (4), each layer of closed supporting plate (4) is provided with a membrane fine filtering mechanism (5), the middle part of the membrane fine filtering mechanism (5) is provided with a filtering water pipe (6) capable of penetrating through the closed supporting plate (4), and the bottom of the fine filter (3) is provided with a water outlet pipe (7). The oil-containing waste water is primarily filtered by the rotational-flow rough filter and then filtered by the two layers of membrane fine filtering mechanism in the fine filter, so that the quality of the discharged water is stable; and the oil-containing waste water treatment device is easy in automatic control and management, simple to operate, small in floor occupation area, little in investment and suitable for being popularized to use.