本文报道了用微滤分离乳化含油废水的研究，利用微滤过程中膜淤塞的特点，显著地提高了油水的分离效率，同时维持较高的水透过率。文章讨论了油水分离的机理，并根据实验结果提出流体中适当的油粒粒径分布，是获得较好分离效果的重要条件。本研究表明了在一定条件下，可以用水透过率较高、操作成本降低的微滤取代超滤。 In this paper, the study on the separation of emulsified oily wastewater by microfiltration was reported. By utilizing the characteristics of membrane fouling during the microfiltration process, the separation efficiency of oil and water was significantly improved while maintaining the high water permeability. The paper discussed the mechanism of oil-water separation and proposed the appropriate particle size distribution in the fluid according to the experimental results, which is an important condition for obtaining better separation effect. This study shows that under certain conditions, ultrafiltration can be replaced by microfiltration with higher water permeability and lower operating costs.