Looking back more than 40 years since the reform and opening up, the concept of urban planning has risen to lead urban development with ecological civilization, step by step from “Park in the city” to “city in the park”. Cixi City, as one of the top ten county-level cities with comprehensive economic competitiveness in China, is located in the center of the economic circle of Shanghai, Hangzhou and Ningbo in the Yangtze River Delta. The urban parks have grown from nothing. It is of great significance to explore how to build, under what factors to develop and what role to play. Based on the general situation of urban development in Cixi City and from the perspective of development and change, the construction and development of Cixi urban park are divided into three stages: initial stage (1978-2002), system construction stage (2003-2009) and organic integration stage (2010 to now). The background factors such as county withdrawal and city establishment, system planning, economic power and other background factors, points out that the park with the urban plate expansion, and by the change of point and line, get different stages of park knowledge, fun, interesting different pursuit and the development of social activities, with small big, to explore the Yangtze river delta county-level park development and urban living environment level change.