The wastewater containing oil and emulsion enters into the oily wastewater regulating pool first, in which the oil and water are separated by static sedimentation, and part of the floating oil floats on the liquid surface and flows out through the overflow port; the wastewater containing oil and emulsion is pumped into the pipeline filter and then into the circulating water tank; the emulsion is preheated to 40-50 ℃; the waste emulsion enters into the ceramic membrane host, and the material liquid circulates in the host; the concentrated liquid return valve is opened（ The opening degree is controlled by the pressure at the reflux side, and part of the emulsion flows back to the circulating water tank; the valve at the filtration side is opened, and the filtrate is sent to the SBR (biochemical treatment) system, and the filtrate volume is controlled by controlling the opening degree of the filtrate valve (to make the filtrate flow stable for a long time); when the concentration is about 5-10 times, the concentrated solution is pumped into the concentrated emulsion decomposition tank for static sedimentation separation and floating on the tank The oil is recycled, and the oil and water in the lower part are returned to the wastewater regulating pool.