Exotic plant invasion poses great threat to global biodiversity, and biological control, which is based on the uncritically tested assumption that herbivory will cause plant fitness loss, is widely used to manage exotic noxious weeds.However, the impact of herbivore on plant performance ranging from positive, to neutral, to negative is determined by plant compensatory ability, which is thought to be common in invasive plant species.Nevertheless, the importance of tolerance of herbivory has received little attention in biological control, and we know little about the invasive plant tolerance dynamics after re-association with herbivores in invasive ranges.