The invention relates to a high-strength anti-collision tube used for a car and a manufacturing method thereof, wherein a. the high-strength anti-collision tube comprises the chemical compositions according to percentages by weights of 0.15-0.25 percent of C, 0. 8-1.5 percent of Mn, 0.2-0.5 percent of Si, 0.01-0.04 percent of Ti, 0.001-0.004 percent of B, 0.05-0.15 percent of V, more than 0.008 percent and less than or equal to 0.015 percent of N, and the rest of Fe and unavoidable impurities; b. the manufacturing method comprises the following steps: the chemical compositions are smelted and cast into a steel ingot; c. a steel tube is made by a process of punching plus cold rolling or cold drawing; d. the heat treatment of the processes of normalizing, high-frequency induction hardening and annealing is carried out for the steel tube, wherein the normalizing temperature is 800-900 DEG C, and the normalizing heat-insulation time is 10-40 minutes; the high-frequency induction hardening and heating time is 2-4 seconds, and the hardening and heating temperature is 900-950 DEG C; the annealing temperature is 150-250 DEG C, and the heat insulation time is 0.5-4 hours. The invention can produce the car anti-collision tube with the maximum wall thickness of 2.5mm, not only ensures that the high-frequency induction heating is even, but also fully restricts grains to grow and has the advantages of even superfine crystal organizations, ultrahigh strength, good tenacity, and the like.