The annual mean wind speed data of 701 meteorological observation stations have been detected by using Penalized Maximal F Test （PMFT） and the detailed metadata archive. The results show that the homogeneity detection method works well for the annual mean wind speed data over China. The number of change points of the annual mean wind speed may be one or two. The annual mean wind speed series of 61.3 percent are homogeneous among the detected 701 stations, showing that the homogeneity of the annual mean wind speed is good in most areas of China. The changes of instrument and location are the two main causes for the nonhomogeneity, and the changes in the type of the observation instrument are the most important causes for the nonhomogeneity of the annual mean wind speed over China.