Payments for ecosystem services (PES) are one kind of important tool for environmental protection, and have been widely studied by international scholars and conservationists. Based various definitions of PES from recent articles, we have outlined four principles for PES: parity, measurability, additionality and conditionality, and then have used these principles to develop a formula to calculate a standard for PES. Finding a way to use PES to achieve a win-win relationship between economic growth and environmental protection in the Beijing-Tianjin-Hebei Region (BTHR) is a key task for Chinese government. Synergetic development of BTHR has become a national strategy, like The Belt and Road Initiative. This article employed the formula we developed to calculate the net horizontal PES amounts that each provincial government within BTHR should pay. Our findings show that Beijing should have paid 10.44×109 Yuan (0.4％ of Beijing's GRP) and Tianjin 16.56×109 Yuan (0.93％ of Tianjin's GRP) to Hebei in 2016.%生态补偿作为一种重要的环境保护工具,已经被国内外学者广泛认可.依据现有文献中对生态补偿的各种定义,我们概括了生态补偿的四条原则,包括对等性、可测性、额外性和条件性,然后又构建了生态补偿标准的计算公式.与此同时,京津冀地区如何实现增长与保护之间的均衡,是我国面临的一项重要课题,因为京津冀协同发展,如同"一带一路"倡议一样,已经成为国家战略之一.本文计算了京津冀地区中三个省级政府各自应该支付或得到的横向生态补偿净额.结果表明,2016年,依国际通用的生态系统服务经济价值估算标准,北京和天津应分别向河北支付104.4亿元(占北京地区生产总值的0.4％)和165.6亿元(占天津地区生产总值的0.93％).
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