In order to ensure the rapid, convenient and efficient distribution of land-side road traffic in the T3 terminal area of the Changsha Huanghua International Airport, the landside road distribution system of the terminal area is analyzed and designed from the demand of traffic organization, analysis of upper planning road network, optimization of traffic organization, overall design of road distribution system, scheme evaluation, characteristics and the other aspects. On the basis of the overall planning of road network structure in the terminal area, in the design scheme, the traffic organization of the landside road distribution system is specially optimized, the structural types of viaduct and subway are fully utilized, the layout of road distribution system is the three-dimensional, and the inbound and outbound traffics are reasonably organized. Finally, the characteristics of the scheme are summarized and evaluated.