Abstract: Objective and MethodThe indicator system of land ecological security were established based on the P-S-R model, the weight of the indicator was determined by the method of mean square deviation, and the land ecological security were calculated from 1995 to 2005. ResultThe result showed that the change of the land ecological security in Huocheng County had experienced three stages: decrease,increase and re-decrease. ConclusionOn the basis of the analysis of the causes, the strategies of the construction of land ecological security in Huocheng County were brought forward.