The harmonious coexistence of man and nature is the essential requirement of Chinese modernization.Actively developing ecological recreation activities in world natural heritage sites with public welfare characteristics to give full play to the value cognition and affective education function of tourists'pro-environmental behavior is the best way to effectively solve the dilemma of ecological value realization in heritage sites in the new era,and to promote the harmonious coexistence of man and nature.Under the theoretical model of'value-affection-behavior',taking Libo World Natural Heritage Site as a case,the structural equation model is used to empirically analyze the relationship between tourists'environmental concern,environmental affection and pro-environmental behavior in the context of ecological recreation in the heritage site.The results show that:1)Ecosphere environmental concern and altruistic environmental concern have a significant positive impact on the pro-environmental behavior of heritage tourists,while self-interest environmental concern has no significant impact on the pro-environmental behavior of heritage tourists.2)Except egoistic environmental concern,the ecosystem environmental concern and altruistic environmental concern both significantly positively impact the environmental affection of tourists in heritage sites,and environmental affection significantly positively impacts the pro-environmental behavior of tourists in heritage sites.3)The environmental guilt has no significantly mediating effect between self-interested environmental concern and pro-environmental behavior of tourists in heritage sites,the environmental pride and environmental guilt both have significantly mediating effects between environmental concern and pro-environmental behavior of tourists in heritage sites.Based on this,this study clarifies the influence path of pro-environmental behavior of tourists in heritage sites with different value orientations,and provides a guidance for high-quality development of harmonious coexistence between human being and nature in heritage sites in the new era.