Based on the simulation and qualitative analysis, the economic trend and the primal problems faced by China in 2011 and in 2012 are analyzed and forecasted. A forecast on the primary indicators for national economy from 2011 to 2012 is issued. An analysis on the macro-economic situation shows that, China's economy is affected by the Europe debt crisis, and it's an important issue to keep prices stable in the economic operation. The macro-economic regulation should be stable and the policy should be prudent and flexible. Also, the development pattern should be changed. <<