The flexible structure in probe-drogue aerial refueling system often occurs the hose whipping phenomenon in different de? grees， which greatly affects the safety of aerial refueling mission. Based on flexible multibody dynamics， a dynamic model of aerial refueling system is built. The large deformation， large-scale movement and variable length characteristic of the hose are described by beam element that based on arbitrary Lagrange-Euler description and absolute node coordinate method. The aerodynamic model on the aerial refueling system is built， which can reflect the coupling effect between the movement of the tank and the receiver， the deformation of hose and aerodynamic force. Based on the dynamics model， the hose whipping phenomenon in flight is reproduced， and the formation mechanism of the phenomenon is obtained. The research shows that the docking impact is the main cause of whipping phenomenon， which changes the equilibrium state of the hose and causes shear waves to propagate and reflect back. The results of multi-case simulation are used for analyzing the influence law of various factors， including hose stiffness， docking speed and Mach number， on the shear force， longitudinal wave and shear wave propagation speed of the hose when whipping phenome? non happened. The effectiveness of hose reeling in/out control and buffered probe for vibration suppression of hose whipping phe? nomenon is also analyzed， which provides an important reference for improving the safety of probe-drogue aerial refueling system.