Abstract: A quasi-geostrophic baroclinic model is used to study the correlation between the asymmetric structure and moving velocity of typhoon.Results show that:1) the moving velocity of typhoon in west-east direction is negatively interrelated to the asymmetry in west-east and southwest-northeast direction at a distance of 100 km to 300 km away from typhoon center,while the moving velocity in north-south direction has a strong positive relationship with the asymmetry in northwest-southeast direction at a distance of 200 km to 500 km away from the center;2)asymmetry of the lowest level circulation is the highest correlated to typhoon's moving velocity.