Abstract: Objective:To compare the differences between dominant-side and non-dominant-side ankle kinematics and ground reaction force during landing stage in repeated vertical jump.Method:Thirteen healthy adults were recruited to perform the repeated vertical jump from platforms five times with both legs.The height of the center of gravity is used as the standard to choose the best jumping for analysis.The ground reaction force,ankle kinematics were measured in both lower extremities.Paired t test was used to analyze the effects of laterality.Result:The peak angular velocities in dorsiflexion and inversion of dominant-side were significantly higher than the non-dominant-side during dropping stage in repeated vertical jump(P<0.05),and no significant differences were found in most of the kinematic and kinetic variables.Conclusion:Compared with the dominant side,the non-dominant side has greater restraint in ankle flexor and abduction activity,meanwhile,the dominant side is in greater injury risk during landing.