The utility model relates to an anti-bouncing device capable of preventing long point rails from bouncing and a novel point rail anti-bouncing system formed by the anti-bouncing device. The anti-bouncing device is installed on an anti-bouncing supporting board which is disposed on wing rails at two sides, adjusting flakes are arranged to adjust different positions between the anti-bouncing device and the supporting board, and space between an anti-bouncing plate in the anti-bouncing device and an anti-bouncing platform at the front end of the actual tip of a long point rail is 1+-0.5mm.The anti-bouncing device and the anti-bouncing system have the advantages that by adjusting space between an anti-bouncing plate in the anti-bouncing device and an anti-bouncing platform at the front end of the actual tip of a long point rail with the adjusting flakes, anti-bouncing function of the anti-bouncing device is realized.