Research on Ecological Evaluation Model Based on Principal Component Analysis

In recent years, China has adhered to the concept of sustainable development respecting nature, protecting nature and living in harmony with nature. A typical example is China’s long-term ecological management Saihanba. Since 1962, after more than half a century rescue, established world’s largest artificial forest, improving environment Saihanba area, making lungs surrounding cities (Beijing, Tianjin, etc.). We collect relevant environmental data from 2002 2020, 11 indicators through principal component analysis, score annual quality 99% confidence, propose an assessment model for second part, we Beijing such as frequency sandstorms, particle concentration, etc., aims explore benefits governance cities. The results show that implementation measures, been improved, it had positive impact on cities, is, improved nearby Tianjin.