Abstract: It is of urgent and realistic significance to assess the wind-break and sand-fixing function value of grassland. Based on the actual situation of grassland ecosystem in West Ujimqin Banner of Inner Mongolia, the wind-break and sand-fixing function and value counting method of grassland in this region was studied. The results showed that in the years of 2000, 2005 and 2010,the reduction of soil erosion loss of grassland in West Ujimqin Banner was 7.12 ×10^-7, 7.12 ×10^-7, 7.13 ×10^-7t, respectively; the reduction of soil erosion degradation area of grassland this region was 10 549.05, 10 540.98, 10 558.44 hm^2, respectively; the value of wind-break and sand-fixing function of grassland this region was 273.83 million RMB Yuan, 277.22 million RMB Yuan and 283.51 million RMB Yuan. From 2000 to 2005, the total value of wind-break and sand-fixing function in West Ujimqin Banner was increased by 1.24%, and from 2005 to 2010, the total value of increased wind-break and sand-fixing function in this region was increased by 3.53%.