Abstract: Environmental education is one of the key features of national parks. It is a powerful guarantee for promoting the ecological civilization and establishing an ecological concept of harmony between man and nature. As a natural educational place for the public, American national parks have established a refined environmental education system after a century of exploration. From the perspective of field theory, based on the comprehensive analysis of environmental education field with national parks as the carrier, this paper summarizes the complete environmental education system in American national parks from the viewpoints of field managers, educators, educatees and other participants. The cooperative management model of multi-parties of environmental education in China's national parks is discussed, in order to provide inspirations for the construction and development of China's national parks.