Grassland serves as the basic resources and condition for the survival of human. It is meaningful for us to protect grassland and restore the areas that are seriously damaged gradually as well as refund the natural ecological grassland. It can not only make the land ecological service get a valid guarantee, but also play an important role in the land ecosystem equilibrium and the formation of the regional pattern for ecological security. Strengthening the research on grassland change at the county level about its characteristics, rules, spatial patterns etc., have important sense to guiding the protection of grassland at the county level and realizing the sustainable development of social economy. In this paper, based on global and local spatial autocorrelation analyses of exploratory spatial data, the spatial disparities about grassland change at the county level in Beijing-Tianjin-Hebei Area are discussed by using GIS and Geoda software. The conclusions are as follows: 1) During 1980-2000, the global spatial autocorrelation of forest land changes is significant. Global Moran’s I is the significant positive spatial correlation because it is 0.1844. The spatial clustering phenomenon about the changes of grassland in Beijing-Tianjin-Hebei Area appears on the whole. 2) There is an obviously temporal increase of Moran’s I value from 1980-1995 to 1995-2000. That is, there was a dramatic increase about grassland change’s spatial clustering in Beijing-Tianjin-Hebei Area. 3) The extent of grassland change is almost the same in some region by analyzing the grid figure of Local Moran’s I. Especially, the characteristic of spatial clustering about regional high value and low value is significant. 4) The counties of the positive spatial correlation in local indicators of spatial association are in the majority. The regions with the "high-high" correlation are mainly located in the north-west hilly area during 1995-2000. However, the regions with the "low-low" correlation were distributed in middle area during 1995-2000.