The utility model relates to a special sewage treatment device for a high-level biosafety laboratory, which is characterized by comprising a pressure vessel. The pressure vessel is connected with a sewage collection device, a high-temperature sterilization device, a safety relief device and a control device, and the control device comprises a touch screen and a programmable controller and is connected with the sewage collection device, the high-temperature sterilization device and the safety relief device in a controlling way. The sewage treatment device has a reasonable structural design, and can realize the effective inactivation of waste water of the biological laboratory and the collection and intelligent disinfection and sterilization of sewage discharged by the biological laboratory, so that the waste water discharged into the municipal pipeline network is free from polluting microorganisms. The sewage treatment device is convenient to use and maintain and has a low operating cost and a long service life.