Unemployment rate has been increasing rapidly in advanced economies since the eruption of global financial crisis，and becoming the major challenges for policy makers. Business cycle caused by financial crisis and structural problems caused by globalization contributed to the high unemployment rate. Stimulus policy’s role is weakened in term of reducing jobless in the environment of globalization. Owing to structural problems，unemployment rate will stay at high level for long time，and this will delay the exit of stimulus packages and spread asset bubble risks to emerging markets.