The spatial patterns of sea surface strong wind (beyond Beaufort wind scale 6) in the China Sea are analyzed through adopting the high resolution Cross Calibrated Multi Platform (CCMP) wind data. According to the definitions of the China costal sea areas by the National Meteorological Center (NMC), the seasonal variations of the strong wind days in these 18 sea areas are also examined. The analysis results show that the highest values of strong wind days and speed are centering around the Bashi Channel, Taiwan Strait and the Northeast part of South China Sea (SCS). The seasonal variations in coastal China seas can obviously reflect that the East Asia monsoon is strong in winter and weak in summer. In winter, the centers of strong wind days and speed always locate in the northeast part of ECS, Bashi Channel, Taiwan Strait, and the northeast part of SCS, and the maximum days and strongest speed appear in December; while in summer, these centers disappear. The center locating in the southwest part of SCS disappears from April. However, the seasonal changes of the strong wind days in these eighteen sea areas are different. Those in the middle and south parts of SCS have two peaks: one occurring from December to January, and the other from July to August. While in other thirteen sea areas, the high value of the strong wind days appears from December to January and the low one from June to July.