The establishment of horizontally ecological compensation with the goal of increasing the forest coverage rate not only ensures that the interests of regions where the ecological environment is protected and developed can be granted, but also enables the regions with limited green space to fulfill their greening responsibilities while developing the economy, thus promoting the positive interactions between ecologically protected regions and economic development regions. Taking Chongqing as an example, the index price of forest ecological compensation was calculated considering regional differences in the quantity, quality, and afforestation management cost of different types of forest resources. Meanwhile, the expected goal achievement rate of forest coverage rate in 2025 in 38 districts and counties of Chongqing was analyzed by establishing the Grey Prediction GM (1, 1) model and benchmarking to the 14th Five-Year Plan. Then, the docking relationship between supply and demand of the horizontal ecological compensation at the cross-county level was explored when the forest coverage rate of Chongqing would achieve a balance between supply and demand. The results showed the following. (1) The forest compensation price per unit area in the 38 districts and counties ranged from 56900 yuan to 73200 yuan per hectare, when considering the quantity, quality, and cost of different types of forest resources. This was 0.79 times higher than the current unified guidance price based on cost of 37,500 yuan per hectare, with an average of 67200 yuan per hectare. (2) In the past 10 years, except for eight districts and counties, i.e., Dadukou District, Jiangbei District, Jiulongpo District, Nan'an District, Changshou District, Yongchuan District, Tongnan District, and Zhongxian County, the forest coverage rate of the other 30 districts and counties experienced positive growth. It was predicted that 45% of the districts and counties of Chongqing would reach the standard of forest coverage rate by 2025, of which Shapingba District was the highest (117.37%) and Jiangbei District was the lowest (41.49%). (3) Fourteen pairs of compensation subject and object were matched according to four aspects including supply and demand level, pairing relationship of counterpart assistance, location relationship, and government willingness to purchase of each district and county. Additionally, the forest area to be purchased ranged between 1300 and 38200 hectares, and thus the total amount of ecological compensation ranged between 91 million yuan and 2520 million yuan, with an average of 872 million yuan. Therefore, the ecological compensation standard constructed combining with the quantity structure, quality and afforestation management, and protection cost of different types of forests resources is conducive to improving forest quality and enhancing forest ecological functions, and can also provide a reference for each of the 38 districts and counties in Chongqing to achieve horizontally ecological compensation in multiple ways.