Abstract: In order to reconstruct the historical typhoon wind field in the Northwest Pacific Ocean and calculate the maximum wind speed in 50 years of the Northwest Pacific Ocean, Yan Meng wind field model is used to simulate the wind field. There are 3 important parameters for wind field simulation in Yan Meng wind field model: The radius of maximum wind, pressure distribution constant B, and roughness z₀. Therefore, it is necessary to test and reasonably optimize the value of the three parameters by measured data of the buoy stations during the typhoon in the Northwest Pacific Ocean.First, based on the JTWC (Joint Typhoon Warning Center) dataset, the relationship between the radius of maximum wind and its impact factors is discussed and four combinations scheme of calculating the radius of maximum wind are proposed, and then the best combination scheme is selected through the measured data. Second, the values of B and z₀ are estimated with the observed wind speed of buoy stations during different typhoons. Finally, the simulation effect of the typhoon wind field at sea is evaluated with 19 typhoon processes, and the applicability of the model and estimation scheme of three parameters are verified.The results show that it is more reasonable to find the radius of maximum wind by combination scheme of V_max (the maximum wind speed of typhoon center) and the latitude of typhoon. In the parameter value test, the wind speed simulation effect of sea surface (buoy stations) is better given z₀ being 0.005 m and B being 1.0, according to the absolute deviation between the simulated and the measured maximum wind speed at 10 buoy stations during 6 typhoons. Except for the parameter test, 19 other typhoon processes landing in northern Fujian and Zhejiang, heading north to the East China Sea, moving west to the South China Sea, and crossing Taiwan Island into the Taiwan Strait are selected to test the simulation effect, which illustrates that when the V_max published by Central Meteorological Observatory is below 40 m·s^-1, the simulated V_max is close to the published V_max if B is equal to 1.0 and z₀ is equal to 0.005 m, and the simulated wind speed in the non-maximum wind speed region is well fitted with the observed wind speed of the buoy stations. In addition, When V_max published is greater than or equal to 40 m·s^-1, the simulated V_max is close to the published V_max if B is equal to 1.4 and z₀ is equal to 0.005 m, and the simulated wind speed of non-maximum wind speed region is more reasonable when B is equal to 1.0 and z₀ is equal to 0.005 m.