To assess the simulation effects of MPAS with icosahedral mesh and WRF with latitude-longitude mesh in global modes,thesimulated vorticity,precipitation,height and temperature from thesetwo models in China from October 23,2010 to October 28,2010 were compared.Results show that both the MPAS and WRF simulate the vorticity at 500 hPa with good effects under 30 km and 60 km resolutions,yet none of them can accuratelysimulatethe extreme value centers of vorticity.From the simulation results of the accumulated precipitation at the 4th day,both the MPAS and WRF can simulate the rainfall distribution,and MPAS is superior to WRF in general simulation result,while WRF is superior to MPAS in precipitation value centers simulation.MPAS works well for height and temperature fields at upper level;while WRF is good for those at middle and low level,and long in forecast validity period than MPAS.The increase of mesh resolution improves the simulation effect of WRF,and affects little on MPAS simulation.