This paper studies the basic characteristics of China's economic cycle from January 1990 to December 2007, and finds out that the transfer model of the three-zone Markov system is suitable for depicting the fluctuation of China's economic cycle. China's economic growth shows a rapid growth, rapid growth, high-growth stage of the law, and found that China's economic cycle in the probability of regional transfer asymmetry; the probability of transfer estimates that China's economic growth in the "moderate growth Stage "the strongest stability, the longest duration, the economic cycle to the stage of the probability of transfer is also the largest.