The utility model discloses a cement sewer pipe, which comprises a circular pipe, wherein, a half-round spacer, the inner diameter of which is slightly greater than the outer diameter of the circular pipe is arranged below the end part at one end of the circular pipe; the half-round spacer is directly preformed and connected with the outer side of the end part of the circular pipe; or one end head of the circular pipe is a bell mouth, the lower half part of which is extended to form the half-round spacer; the sewer pipe also comprises a half-round cover plate corresponding to the half-round spacer. The utility model can cause the interface position of the sewer pipe to be closed safely without water leakage, and the utility model has quite convenient construction and operation.