The front bumper has the functions of safety protection, decorating the vehicle and improving the aerodynamic characteristics of the vehicle. From the safety point of view, when a car has a low-speed collision accident, it can play a buffering role to protect the front and rear body; it can play a role in protecting pedestrians in the event of an accident with pedestrians. From the appearance, it is decorative and has become an important part of the decoration of the car. At the same time, the front bumper of the car has a certain aerodynamic effect.
At the same time, in order to reduce the damage to the occupant when the car is in a side collision accident, the front bumper of the door is usually installed on the car to enhance the anti-collision impact of the door. This method is practical and simple, and has little change to the structure of the vehicle body. It has been widely used. As early as the 1993 Shenzhen International Automobile Exhibition, the Honda Accord exhibited a part of the door to expose the front bumper to the audience to show its good safety performance.
Installing the front bumper of the door is to erect or tilt several high-strength steel beams in the door panel of each door to function as the front bumper of the front and rear of the car, so that the front bumper of the whole car has front and rear bumpers. “Guarding the car” forms a “bronze wall” that gives the car occupants a maximum safe area. Of course, the installation of this front door bumper will undoubtedly increase the cost for the car manufacturer, but for the occupants of the car, the safety and security will increase a lot.
On September 1, 2013, China's "Automobile Protection Bar" industry standard, the standard  will be officially implemented. The standard was drafted by Guangdong Dongjian Group. Many domestic research institutes and professional institutions participated in the demonstration, and in 2014, In April, it was approved by the Ministry of Industry and Information Technology. The implementation of the protective bar industry standard will guide the automobile protective bars and front bumper manufacturers to strictly follow the national and industrial standards for production.