The utility model provides a sewage deoiling combined system: adjust jar, oil slick and dispersed oil processing unit and oil emulsion and soluble oil processing unit including consecutive raw materials water degassing tank, homogeneity, the oil emulsion adopts the milipore filter degreaser with soluble oil processing unit. This deoiling combined system adopts the milipore filter material to realize the oil emulsion and the water oil separating of soluble oil that is difficult to to detach to conventional method, through raw materials water degassing tank, homogeneity adjust jar, organic combination of oil slick and dispersed oil processing unit and milipore filter degreaser, optimized oily sewage separation technology, realized oily sewage's stability, high -efficient water oil separating, guaranteed after treatment system's steady operation, practiced thrift the investment. This deoiling combined system can be applied to and degrease including sulphur ammonia sewage.