To simulate the wave in coastal areas of Jiangsu more accurately,this paper combines the measured wave spectrum of north Jiangsu with the SWAN model.In the case of cold wave weather,with the wind field data provided by CCMP,we simulate the wave field in coastal areas of north Jiangsu using the measured wave spectrum and spectrum by defaut respectively.The result demonstrates that the simulation with measured wave spectrum is in good agreement with the observed data.Calculating the wave field of the engineering region in Jiangsu province using the measured wave spectrum of north Jiangsu,we get the reasonable result.