Based on the TOPEX/Poseidon(T/P) satellite sea level anomaly(SLA) data during 1993-2012 and FSCR(Climate Forecast System Reanalysis) wind data,the temporal-spatial features of sea level of Yellow Sea and East China Sea within the 20 years are analyzed.The impacts of wind fields within different periods on the sea level are investigated,and the possible mechanisms of sea level change of short duration are studied by FVCOM(Finite Volume Community Ocean Model).The results show that the average sea level of Yellow Sea and East China Sea in recent 20 years is high in southern and low in northern;seasonal wind fields near the sea surface with coastal distribution and sea water thermal swelling together force the sea level plus deviations in summer and autumn,and minus deviations in winter and spring.The average wind speed near the sea surface is gradually decreasing and the sea level rising speed is about 2.9 mm/a during the 20 years.The short duration actions of wind field mainly present as disastrous wind events.According to statistics,both the summer typhoon and the winter cold wave show a trend of decrease in frequency and increase in intensity during the 20 years.The FVCOM model is used to simulate and analyze the sea level changes of Yellow Sea-East China Sea under typhoon and cold wave impacts,and results show that the strong typhoon wind creates the divergent cyclone vortex of sea current with sea level of negative low surface center,while the strong cold wave wind from north creates the anti-cyclone vortex of sea current with sea level of positive high surface center.The strong sea current areas in the two types of vortexes increase the sea surface gradient.Due to the unstable sea temperature profile with depth and the active convection impact caused by the winter cold wave,the kinetic energy and momentum were transported downwards more faster in depth and intensity,compared with that of summer typhoon.