Public gardens occupy an important position in Chinese classical garden system. With the speeding up of urbanization process,large public gardens are moreclosely linked with urban public space and social life. The Shicha Lake area is a typical urban public space in the Beijing central axis, which is the residents’ most favorite public sightseeing district. At the same time, it is the largest public water garden of Beijing inner city. Take Shicha Lake as an example,this paper wil discuss the value of history public gardens in many aspects, such as ecological, aesthetic, cultural and social, which is going tobe instructive to the construction of urban public space, the ecological civilization, and a harmonious societyin the future.%公共园林在中国古典园林体系中占有重要的地位。随着城市化进程的加快，大型公共园林与城市公共空间和社会生活的联系也越来越紧密。什刹海地区是北京城中轴线上典型的城市公共空间，是首都居民最为喜爱的公共游览区。同时，这里也是北京内城最大的一处水系公共园林，以什刹海为例，从生态、审美、文化和社会等方面来思考历史公共园林的价值，将对今后城市公共空间建设、生态文明建设以及和谐社会的构建具有启发意义。
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