The triangle model was used to evaluate the efficiency of the land use in Zhengding County of Hebei Province． Based on the relationship among the economic，social and ecological benefits of land use，the triangle model was establish in the Origin software package to assess the land use efficiency in Zhengding County from 1997 to 2008．The results show that the detailed classification and intuitive diagram from the triangle model described effectively the types and trends of land use． The land use efficiency of Zhengding County could be divided into six classes，the land use efficiency of Zhengding County changed from the ecology-lagging unsustainable state to the ecology-leading，societyleading，and economy-leading weakly sustainable state．