Rear bumper for passenger vehicle and manufacturing method thereof

The invention relates to a rear bumper for a passenger vehicle and a manufacturing method thereof. The rear bumper for the passenger vehicle is profile; the section shape of the rear bumper for the passenger vehicle is a B-shaped structure; the rear bumper for the passenger vehicle comprises a peripheral rectangular material and a middle reinforcing rib; the rear bumper for the passenger vehicle is formed by bending and welding one steel sheet from two ends to one side for multiple times; and the profile is longitudinally bent. The rear bumper for the passenger vehicle has the advantages thatthe integrity and the stability of the product structure are guaranteed by using rolled profile and an online double-laser welding process; and due to good quality and reasonable process of the rolledprofile of the rear bumper, the original multi-piece structure is replaced with one-piece structure so that the integration of light weight and functionalization is realized. 种乘用车的后保险杠及其制造方法，所述后保险杠为型材，截面形状为个日字形结构，包括外围矩形材料和中部加