UPVC pipe used for sewage treatment

The utility model discloses a UPVC pipe used for sewage treatment. The UPVC pipe used for sewage treatment comprises a pipe body, a spigot steel ring and a socket steel ring. The pipe body sequentially comprises a PVC resin corrosion-preventing sheet, a steel cylinder inner wall concrete layer, a steel cylinder, a steel cylinder outer wall concrete layer, prestressed steel wires and a cement mortar protecting layer from interior to exterior. One end of the pipe body sinks from the outer surface of the pipe body to the center of the pipe body to form an annular socket and spigot groove used for installing the spigot steel ring. Double concave ring grooves are formed in the annular socket and spigot groove, O-type elastic rubber rings are installed on double rubber ring grooves respectively, and the outer diameter of each O-type elastic rubber ring is slightly larger than the inner diameter of the socket steel ring. The spigot steel ring is arranged at one end of the pipe body and provided with the double rubber ring grooves matched with the double concave ring grooves. The socket steel ring is arranged at the other end of the pipe body.