The Study on the Ecological Priority of Urban and Rural Planning with the Support of Digital Ecological Model

priority is gradually becoming an important principle of regional,urban and rural planning. Digital ecological model has been generated,and digital ecological basis for design-making of urban and rural planning has been formed in the paper. The basis can provide data for planning urban development reserve land and preserving key ecological land,and facilitate coordinating layout and ecological resources complementary of urban and rural ecological land from the space and mass. Ecological priority principle can be penetrated throughout the whole process of urban and rural planning through ecological evaluation. The pattern will promote that planning can guarantee high quality of urban and rural ecological services,providing the necessary urban growing space, and guiding the urban rational construction and expansion at the same time.