To understand the effect of the outlet temperature on the early physical and mechanical properties of cement, 12 groups of water consumption tests for cement standard consistency and 16 groups of cement mortar strength tests were carried out by controlling the temperature of cement use and mixing water. The results show that with the increase of the temperature of cement outlet, the water consumption for cement standard consistency using normal temperature water (17℃) and cold water (5℃) will increase; however, the standard consistency of water consumption is relatively small when using cold water. The early mechanical properties of cement will also decrease with the increase of the outlet temperature, but it has higher early mechanical properties when mixed with cold water. Under the long-term curing conditions of cement specimens, the mixing water temperature and the outlet temperature of cement have no obvious influence on the mechanical properties of cement. In the cold region project, when the outlet temperature of the cement is too high, the groundwater with lower temperature can be used for mixing, which can avoid the cement mixture being too dry and effectively improve the early mechanical properties of the cement.