On the reviews of researches on rural tourism around China and abroad,the spaciality of rural tourism was analysed from a new perspective of ecosystem and was thought to be of great significance in distinguishing relevant concepts and guiding the development planning of rural tourism.

Firstly, this paper points out the negative effects of blindly seeking a higher city ranking, and then from a theoretic point of view it indicates that the basic mistake of city ranking is ignoring the connection with the regional space and the hierarchical system of cities.

The authors found that the past quantitative study on regional spatial structure of the Chinese urban system that was based on the random distribution model of Poisson s equation was imperfect,because the contemporary Chinese cities did not fit the character of the random distribution.

Based on the analysis of the status quo of the regional spatial structure of the town system in Gansu, We calculated the distributional situation of 14 main cities, all the 75 cities and towns, and the center area with the fractal theory and method.

The unique regional spatial structure is affected by economy, politics, cultures, geographical environment, etc.

According to the gradient values, authors sum up some characteristics of spatial regional differentiation of economic development level and divide the cities and counties into three economic development gradient areas: high-gradient area, middle-gradient are.