Oil separator for catering waste water

The utility model relates to an oil separator for catering waste water. The oil separator comprises a box body and a spiral solid-liquid separation propelling device, wherein the box body consists of a precipitating box and a separating box, a liquid outlet of the spiral solid-liquid separation propelling device is communicated with the precipitating box, a collecting hood in a shape of a trapezoidal table is arranged at the upper part of the precipitating box, an oil discharging opening is formed in the side wall of the upper part of the collecting hood, the bottom on the right side of the precipitating box is communicated with the bottom on the left side of the separating box, a separating partition board is arranged in the separating box, and a sewage pump is arranged in the separating box on the right side of the separating partition board. Through the technical scheme, waste dregs, grease and waste water in the catering waste water are automatically and effectively separated in a precipitating filter mode through the utilization of the principle of different oil and water gravities, the separating effect is great, oil and water are respectively discharged, and labor cost is reduced. A heating device is automatically started when the grease is condensed in winter and does not need to be started in other seasons. The liquid level is automatically controlled conveniently and reliably, the structure is compact, and the layout is reasonable. The whole equipment is convenient and rapid to mount and convenient to use.