The invention discloses a cement pipe mortar brushing device. The cement pipe mortar brushing device comprises a lifting device, wherein a rotating device is mounted on the lifting device, a longitudinal mortar brushing device is mounted on the rotating device, in the lifting process of the lifting device, the longitudinal mortar brushing device rotates along the end face of a cement pipe under the rotation of the rotating device, the longitudinal mortar brushing device comprises a brush head and a spacing adjusting device, and the spacing adjusting device is used for driving the brush head toadvance or retreat towards the end face of the cement pipe. According to the cement pipe mortar brushing device, the full-height adaptation of a cement component is achieved through lifting of the lifting device, the mortar brushing device is rotated along the end face of the cement component through the rotation of the rotating device to perform plastering, mortar brushing or water spraying, meanwhile, the spacing adjusting device is designed to further adjust the spacing between the brush head and the end face according to different requirements, and meanwhile, the cement pipe mortar brushing device is suitable for cement pipe fittings or components with different pipe diameters or diameters.