本文通过总结北京延庆县平原造林工程的实践经验,并以蔡家河平原造林的设计实施为例,介绍了在城市化过程中,大型林业建设工程如何发挥生态基底作用;提出在新型城镇化背景下,继承和创新城市大园林的理念,突出地域特色和人文精神,建设和经营近自然森林,推进城市与自然生态环境的和谐发展。 This paper summarizes the practical experience of the afforestation project in Yanqing County of Beijing and takes the design and implementation of the afforestation in the Caijiahe Plain as an example to introduce how the large-scale forestry construction project plays an ecological base role in the urbanization process. In the context of the new urbanization, Inherit and innovate the concept of large urban gardens, highlight the regional characteristics and humanistic spirit, construct and operate near natural forests, and promote the harmonious development of urban and natural ecological environment.