M1/M2 is not only a concrete indicator for evaluating flow efficiency of money supply, but also an indicator for judging the economic trend. When the value of M1 /M2 increases, the pressure of inflation will increase and economy is liable to get overheated. Conversely, the economy will be liable to get cold and the pressure of deflation increaes. From the beginning of May in this yar, due to the speed of growth of Ml becomes faster, M1/M2 begins to rise. The risk of acceleration of inflation will increase. The probability of rapid economic growth changing to overheated economy will substantially increase.