Redispersible emulsion powder is the polymer powder, it can significantly improve the inorganic mineral materials such as cement bonded with a wide range of material not far behind the bond strength, enhance cement mortar flexibility so as to greatly improve their resistance cement mortar shrinkage stress and stress the ability of outsiders temperature and humidity, to avoid mortar cracking, falling, and so on. It special polymer powders can also give additional mortar performance and features such as water-flow performance. it can polymer powder in mortar with excellent weathering.