As the starting year of the “13th Five-Year”，China’s economy has achieved remarkable results. The quality and efficiency of economic growth has been improved，the new momentum has also accelerated its growth. This article uses the econometric methods such as synthetic index and pre-warning signal system to monitor and forecast the economic cycle in China. The followings are the brief conclusions：the current round of economic growth cycle has reached its bottom line by the end of October in 2015，its decline duration is up to 25 months. In the year 2016，the tendency shows a slight increase in economic growth in China. Based on the previous index，China’s economic growth is expected to increase in the first half of year 2017；it will reach its peak in around June，and then follow with a slightly steady decline. By considering China’s current economy situation，transition period from high speed to medium speed，the pressure of economic growth decreasing is still heavy. The forecast for the year 2017 real GDP growth rate will reach 6.5% or higher，the price growth cycle will lag behind economic growth cycle in PPI driven by the increase in amplitude，and the CPI will slow up，however，prices still could be controlled within 3%.