[Objective] The status of land ecological security development in the light-to-severe rocky desertification mountainous area of Guangxi Zhuang Autonomous Region was studied in order to provide scientific reference for land ecological security and its sustainable development in study area.[Methods] Based on PSR model, and from three aspects including pressure, state and response, this paper constructed a land ecological security early-warning index system for the light-to-severe rocky desertification mountainous area of Guangxi Zhuang Autonomous Region. The entropy weight method and the integrated model of ecological security were used to calculat the comprehensive index of land ecological in 2005 and 2015 in study area.[Results] The main affecting factors of land ecological security in the rocky desertification mountainous area of Guangxi Zhuang Autonomous Region were the population density, the integrated energy consumption per unit of GDP, the land cultivation rate, the per unit area yied of grain, the urbanization level, the natural population growth rate. Pressure index, state index and response index jointly determined the comprehensive index of land ecological security evaluation in the rocky desertification mountainous area. With respect to time differentiation, from 2005 to 2015, the land ecological security in the rocky desertification mountainous area had changed from critical level to mainly relatively safe level over the past 10 years, the situation of land ecological security was mainly due to the improvement of the response state system, which made the comprehensive land ecological security index increased. With respect to spatial differentiation, the land ecological security was the lowest in 2005, and the level of land ecological security was at a relatively unsafe level in Nanning, Guigang, Laibin areas in 2015.[Conclusions] Although the land ecological security in the rocky desertification mountainous area of Guangxi Zhuang Autonomous Region raised slightly, limited by the level of carrying capacity of pressure and state subsystem, the land ecological security of the study area is still at an intermediate level, the construction of land ecological security needs to be further strengthened.