This invention is for the purpose of providing one kind of pedestrian lower limb invasion to prevent the organization, it is supposes including the group of an arm support systematic group front end chasses, this arm support systematic group has the first, second nose, this first nose is the connection in the chassis, this second nose correspondence chassis is equipped with a cushion; This arm support systematic group including a fulcrum with a flexible brake clevis pin, this fulcrum supposes in the arm support during systematic group, is opposite for the second nose in the chassis carries on the predetermined scope the pivot shaft pendulum; This brake clevis pin also supposes in the arm support during systematic group, with limits the second nose the pivot shaft to suspend the movement; Takes advantage of this, when takes the responsibility the impulse, this cushion may provide the advance cushion, and provides the following cushion by this brake clevis pin, reduces the pedestrian lower limb invasion degree.