A machine for separating oil and water, usually used by ships to treat sewage. Due to environmental protection requirements, the sewage generated by the ship's machinery in rivers, lakes, and seas must be treated. The working principle and process of the oil-water separator system are as follows: 1. Water enters the first stage honeycomb chamber through an AOD pump (diaphragm) ->2. Flow control valve enters ->3. Water flushes the first stage honeycomb chamber. Due to the many tightly packed honeycomb compartments inside, tiny particles in the water settle in the honeycomb chamber during the upstream process. The wastewater flows into the 4 mesh water holes (5/32 ') and enters the adsorption chamber and extraction chamber. The water flows into the oil adsorption chamber composed of JT57 liquid filtration medium. During this process, oil Oil and fat are extensively adsorbed and extracted with a large amount of complex heavy metals and organic compounds TSS, BTEX, PCB, and many water pollutants. Then the water flow turns upward in the adsorption chamber and enters the second stage honeycomb chamber -->6. The water flows through the tightly packed honeycomb layer of the second stage, reversing up and down three times, while the residual trace oil will float up and collect in its upper part. The water flow enters the -->7 clean water chamber, and finally the water is discharged from the bottom of the clean water chamber. The residual trace amounts of oil distributed on the second level honeycomb chamber and clean water chamber are removed by skimming them into external oil storage containers using a skimmer installed at the top.