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The response of non-uniformity of precipitation extremes over China to doubled CO₂ has been analyzed using the daily precipitation simulated by a coupled general circulation model, MIROC_Hires. The major conclusions are as follows: under the CO₂ increasing scenario (SRES A1B), the climatological precipitation extremes are concentrated over the southern China, while they are uniformly distributed over the northern China. For interannual variability, the concentration of precipitation extremes is small over the southern China, but it is opposite over the northern China. The warming effects on the horizontal and vertical scales are different over the northern and southern part of China. Furthermore, the atmospheric stability is also different between the two parts of China. The heterogeneous warming is one of the possible reasons for the changes in non-uniformity of precipitation extremes over China.