The boundary layer blowing is an effective measure to increase the lift of flight vehicles. For a common flight vehicle designed for on-land taking off and landing, the aerodynamic characteristic requirements to on-deck taking off and landing were analyzed based on the project parameters and five schemes were proposed. The lift increase potential of flap and slat steady blowing was researched by numerical simulation. The results indicate that the flap and slat blowing can enhance the lift observably, whereas some interference will appear when both the flap and slat blowing, which lead the slop of lift increase decrease as the blowing moment coefficient augment. When the blowing moment coefficient less than 6%, the maximum lift coefficient can reach about 1.85 and the lift coefficient at 15° of the angle of attack with both the flap and slat blowing can reach about 1.40, from which three schemes can be satisfied for taking off and landing on the deck.