The invention discloses a car lamp lens component and a car with the car lamp lens component. The car lamp lens component comprises a main lens and an auxiliary lens. The main lens is provided with a main light receiving face and a main light transmitting face which are oppositely arranged, an assembling groove which is concaved inwards is formed in one side of the auxiliary lens, an auxiliary light receiving face is arranged on the inner wall face of the assembling groove, an auxiliary light transmitting face is arranged on the other side of the auxiliary lens, the main lens is arranged in the assembling groove, and the main light transmitting face is attached to the auxiliary light receiving face. According to the car lamp lens component, the main lens and the auxiliary lens are combined, the optical requirement is met, meanwhile, various forming requirements, optical design and the light distribution process of a special-shaped lens are guaranteed, various defects of a thick-wall injection molding structure are overcome, forming is convenient, and the rate of finished products is high.