A Comprehensive Evaluation Model Based on the Environmental Impact of Saihanba

China Saihanba Forest Farm has become an ecological green farm with stable sand control function, and an ecological environmental impact assessment model is constructed according to the ecological model of Saihanba Forest Farm. According to the seven data indicators collected, this article uses principal component analysis to analyze. From the principal component scores, it can be seen that there is a significant difference in the scores before and after restoration, indicating that the impact of Saihanba Forest Farm on the ecological environment before and after restoration is very significant. At the same time, in order to establish ecological regions more accurately and extend the ecological protection model to the whole country, based on the AHP (Analytic Hierarchy Process) and TOPSIS (Distance between superior and inferior solutions), a model is established to calculate the comprehensive evaluation indicators of the ecological environment in Liaoning, Ningxia, and Shanxi provinces. The scores of the comprehensive evaluation indicators are used to determine the establishment of ecological zones in Ningxia and Shanxi provinces.