Oil separator system

The invention belongs to the technical field of oil separators, and discloses an oil separator system which comprises an oil separator, a connecting pipe and an oil separator drainage device.The oil separator drainage device comprises a drainage pipe and a first flange, the drainage pipe comprises a water sealing pipe section, and the water sealing pipe section is of a U-shaped structure; one end of the water seal pipe section is fixedly connected with the first flange and is fixedly connected to the connecting pipe through the first flange, and the end, not connected with the first flange, of the connecting pipe penetrates through the top wall of the oil residue bin and is connected to the oil separator. After the oil separator stops working, liquid in the water seal pipe section of the U-shaped structure forms water seal, then water vapor in the oil residue bin can be prevented from entering the oil separator through the drainage pipe, the oil separator is protected, and the water seal pipe section of the U