Abstract: The change trend of hierachical structure of urban system in Henan during the urbanizational course was analysed with geo-fractal theory.It was found that the Zipf's dimension of the size distribution of cities in the study district was decreasing,this meaned that the urban population in different cities was becoming equal,which would give rise to some advantages and some disadvantages as well,the pros and cons from the increase of the fractal dimension were discussed by means of q-function advanced by th...