Urban forest is one of urban ecosystems with the most significant ecological benefits, how to evaluate the ecological benefits of urban forest based on the regional characteristics of different cities, analyze their cost-benefit relationships, and make the layout and input-output of urban forest more economical and reasonable is important. This study uses the i-Tree Eco model, taking urban forest as the research object, to assessing the ecological benefits of urban forest from four aspects: carbon fixation and oxygen release, energy conservation, rainwater retention, and air quality improvement, and converts them into economic benefits. Through mathematical statistical analysis, the cost-benefit relationship of urban forest with different proportions of trees and shrubs was analyzed, and the impact range of urban forests of different layout types was compared. Conclusion: (1) Arbor species are the main factors affecting the ecological benefits of urban forests. When the proportion of arbor is 36%, the cost-benefit of urban forest reaches the average value, and the best cost-benefit arbor coverage rate is 29.81%; (2) The impact of urban linear forest is wider; (3) If the proportion of urban forest tree in the study area is adjusted to 36%, the ecological benefits can increase by 61 million yuan each year. The quantitative model evaluation of urban forest ecological benefits in this study provides efficient and convenient research paths and tools for exploring urban forest ecological benefits, economic benefits, and cost-benefit relationships under different geographical characteristics, which can provide quantitative support to contribute to balanced construction of urban ecological civilization and economy benefits.

ecological civilization,urban forest,ecological benefit,economic benefit,i-Tree Eco model