This study conducted empirical analyses on the changes over time with regard to public educational expenditure as the percentage of GDP，followed by international comparisons of the demand and supply of public educational expenditures during the Eleventh Five-year Plan period，and some predictions on the trend of China’s educational expenditure in the future. It ascertained that by 2010，public educational expenditure as the percentage of GDP should increase to，and in turn maintain a level not lower than 4% in the long run.