Based on the invest1gatlOn and research , the paper glves a testmg method , which measures the taking off and landing distance of airplanes with the laser locatmg system for airplane's trace. And by way of the field measunng on plateau alrports ,we have got the integ'rated modifying coefficients of three kinds of airplanes 'taking off and landing runnmg distance such as H6. All of these provide sClentific basis for the runway length design of the plateau alrport.