This paper uses Randall et al.'s "triad" test to test the asymmetry in China's economic cycle fluctuations. The results of the test show that there is a certain asymmetry in the economic cycle of our country, mainly caused by the investment of fixed assets, the operation of monetary policy and the change of price level. Therefore, it should be based on China's economic cycle fluctuations in the asymmetric characteristics, to take the appropriate economic policy tools to achieve the desired macro-control objectives.