By analyzing the fluctuation and the friction of the runway impact on the ground running attitude and the aerodynamics,the dynamic model of the airplane is established,and then,the research of the take-off performance of the transport on the air strip is studied in this paper. According to the simulation of the motion trajectory and the attitude of the flight,the parameters of the take-off performance and the influence of fluctuation of the runway on the random oscillation of the landing-gear and fuselage are achieved. The results indicate that the dynamic model and the correlative method can satisfy the requirement of the research on the effects of the characteristics of the runway to the take-off performance of airplane.