By the global financial crisis, China's export economy has been badly affected foreign demand decline of China's sustained economic growth become a huge obstacle in this critical situation through stimulating domestic demand to ensure steady economic growth, mainly including investment demand and consumer demand sides. The following will mainly invest in infrastructure from the perspective of the government to explore ways of expanding domestic demand and the basic content analysis of the financial crisis in China's macroeconomic situation, the operational state based on the analysis of the financial expenditure structure of the status quo, and made a number of optimization of infrastructure expenditure recommendations and options with a view to ensuring the healthy development of China's economy continues to make a little effort.