Decorative cement slow-setting reinforcing agent and preparing method thereof

The present invention discloses a slow-setting reinforcing agent for decorative cement and its preparation method. Said slow-setting reinforcing agent is made up by proportioning zinc salt, sodium salt, water reducer and other trace materials and making them pass through such processes as drying, grinding to fineness of 900 meshes, homogenizing and mixing for 30 min. Said slow-setting reinforcingagent can be used in production of terrazzo, it can greatly raise the plasticity of decorative cement, and can improve product structure and strength, also can be mixed with white cement to produce "modified white cement".