This paper is based on the statistical analysis of the economic growth disparity in China form 1978 to 2004 to testify the hypothesis of convergence in economic growth theory in regional growth of China. Panel data is applied to verify the conditional convergence in regional growth, so that some characteristic factors that determine the growth disparity are specified and empirically analyzed. In conclusion, absolute convergence does not exist in regional growth in China. Nevertheless, after controlling the investment rate, investment efficiency, human capital and the level of technology, economies that have a higher level of initial output per labor undergo a lower growth rate, that is, the rate of conditional convergence is approximately 1.4% per year. This rate is to some extent a little slower that in the western industrial countries.