Evaluation of Land Ecological Security in Jinzhai County Based on PSR Model

From the perspective of the county, this article takes Jinzhai County as the research object, using PSR model to construct the land ecological security evaluation system, to calculate the weight by entropy method, and to calculate and research the comprehensive index of land ecological security of Jinzhai County of 2012-2016 years, selecting 25 indexes from the 3 aspects of pressure, state and response. The results show that the comprehensive index of land ecological security in Jinzhai county shows a trend of "inverted W", which first increases, then decreases, grows again, and then decreases. Overall, within 5 years of inspection, the ecological security of land in Jinzhai refers to the state that the value fluctuates, and the security level rises from the "sensitive level" to the "critical level".