This paper analyzes the landing-plans under the different utilization rate of multi-runway airfield and reaches a conclusion of the high efficient landing orderThe result shows that the landing-plans are different according to the different approach density of aircraftWith the increase of the aircraft density of approach,the landing order should be arranged according to the weight of the landing aircraftThe optimum plan is that the medium weight aircraft should land first,and then the giant and the small aircrafts should land on the different runways