This paper uses international synthetic index，general index and the early warning system of econometric methods to measure and predict the situation of China’s economic growth cycle in 2015. From September 2013，the economic growth of our country began a slow decline in a new round of short cycle，and by the early 2015，the economy continued to decline. Because of China’s economic downward pressure，the central bank should timely lower interest rates and the deposit reserve ratio to ease the financing difficulties and financing expensive problem，so that the social cost of financing is reduced. It is expected that the bottom of China’s economic cycle will appear in the first quarter of 2015，and from the beginning of the second quarter，the economy is expected to remain stable with a trend of slightly increase. China’s GDP growth rate in 2015 will reach around 7.2%，and the CPI growth rate will be about 2%. Economic growth and price fluctuation significantly slow down，and the government should take more active measures to keep the economy in good situation with medium speed growth rate and low inflation.