【Objective】 The aims of this article was to study effects of short-term warming, precipitation reduction on the species diversity, functional traits and productivity, reveal the responses of short-term warming, precipitation reduction on community characteristics to climate change in sandy grassland. 【Methods】 The authors investigated the combined effects of precipitation reduction (0%, 20%, 40%and 60%) and warming using open-top chambers (OTCs) on plant community composition, species diversity and functional trait and relationship between community characteristics and environmental factors. 【Results】 The important findings was: (1) Short-term warming, precipitation reduction led to changes in the plant community composition and species dominance of sandy grassland, dominant species of Artemisia scoparia, Lespedeza davurica and the community coverage, aboveground biomass was significantly lower. (2) The short-term warming significantly reduced Margalef richness index, Simpson index, Shannon index and Pielou index, but the short-term precipitation reduction had no significant effect on the four species diversities. (3)The short-term warming significantly increased the heightleaf dry matter content and reduced the leaf thickness, but the short-term precipitation reduction significantly increased the leaf dry matter content, leaf thickness and reduced the height, specific leaf are of plant community. (4) The short-term warming was affecting the species diversity and functional traits of the main environmental factors in sandy grassland. 【Conclusion】 In summary, Short-term warming, precipitation reduction changed community characteristics, temperature was affecting the community characteristics of the main environmental factors in sandy grassland.