The invention discloses a cement water pipe. The cement water pipe comprises a pipe body, a flexible layer, a return spring and a fixture block, wherein a through hole is formed in the pipe body; the flexible layer is cylindrical; the end opening at one end of the flexible layer is fixed in the through hole; the other end of the flexible layer is sealed and fixed with the fixture block; the return spring is arranged on the outer part of the flexible layer in a sleeving mode, and is positioned between the fixture block and the pipe body. According to the cement water pipe, the flow which is instantaneously increased in the water pipe can be buffered, so that the water pipe is prevented from being cracked, and the service life of the cement water pipe is prolonged.