We studied consecutive impact loading on woven high-modulus polyethylene〓rope, which is used in robotics fields. An impact tester was developed to conduct〓the experiments. Five consecutive impact loads (five drops) were applied〓to the rope and the stiffness of the loading part that corresponds to each drop〓was evaluated. The stiffness of the woven ropes was affected strongly by consecutive〓impact loading. The change in stiffness is undesirable in some applications〓such as in robotic fields. Therefore, we have proposed a method that〓can optimize changes in stiffness by applying a preload before impact testing〓(preload treatment). The experimental results show that preload is an efficient〓way to reduce changing rope stiffness. We have also proposed an empirical〓equation that can estimate the rope stiffness after arbitrary preload treatment,〓and this equation is a function of the number of drops and the static preload〓level. The equation can be used to determine the preload treatment conditions〓to stabilize the stiffness of the woven ropes before they are used in engineering〓fields