According to the standard of IMF (2001),I measured the size from 2003 to 2012 and the structure in 2012 of China's full-covered fiscal expenditure.Furthermore,I compared the size of China's fiscal expenditure with OECD countries.I find that as China is going through the "dual-peak" period:the peak of infrastructure development and social welfare expansion,the overall financial expenditure share of GDP has risen from around 31% in 2003,to around 37% in 2012.The ratio of infrastructure expenditure to whole fiscal expenditure is about 39%,while spending on social welfare is only about 41%.