Under the context of wind-reducing worldwide, researching the effects of wind speed change on grassland ecosystem, which plays an important role in terrestrial ecosystem, has important significances. The experiment results over decades show that:(1) wind speed change impacts plant growth rates and leaf shapes. Appropriate wind speed can improve plant growth and enhance the primary productivity. But strong wind or continuous wind might damage plant; (2)Wind takes away soil fine particles (e.g., silt and clay) from soil surface first, which lead to soil structural change, soil moisture reduction and the redistribution of nutrients; (3)Wind induces the transfer and exchange of materials and energy between land surface and atmosphere, which can change the surface micro-climate. For example, soil surface temperature will rise due to reduced wind; (4) Wind can decrease the soil moisture and change the nutrient component, making grassland ecosystem structure varied, grassland cover decreased, plant life forms complicated and drought-tolerant plants increased; (5) Atmospheric stability, CO₂ exchange rate and carbon emission increase with wind speed acceleration. Carbon absorption is the opposite. As a result, carbon flux also changes. Above all, It has its pros and cons for the effect of wind speed decrease on grassland ecosystem. In the future,the study will be more focused on the following aspects:Research object diversification; Quantitative study by strengthening the control of experiment; Comprehensive interaction mechanism of multi factor; the overall structure and functional study.