Part capable of achieving braking when people step on accelerator instead of brake for braking by mistake

The utility model discloses a part capable of achieving braking when people step on an accelerator instead of a brake for braking by mistake. According to the part, an existing accelerator and an existing brake of a vehicle are replaced by only adding a rotary shaft, a backup braking rod and a spring to an original structure, so that the problem that serious property loss and human injuries which should not be caused are caused when a new driver or an experienced driver steps on an accelerator instead of a brake for braking by mistake against human will and keeps stepping on the accelerator to further accelerate a vehicle during instant emergency when the driver drives a vehicle with an accelerator and a brake is solved, to meet the objective law of the mechanism of the human brain, the existing vehicle accelerator and brake structures are changed into the part capable of achieving braking when people step on an accelerator instead of a brake for braking by mistake without changing the operation of the original accelerator and brake at all, and therefore safety is improved and property loss and human injuries are avoided. The part is a dual-functional mechanical device which is composed of a pedal control throttle lever, an accelerator control wire rod, the rotary shaft, the spring, a brake rod and the backup braking rod and serves as both an accelerator and a brake.