LOW-BEAM OPTICAL MODULE, LOW-BEAM ILLUMINATION MODULE, VEHICLE LAMP AND VEHICLE

The disclosure provides a low beam optical module, a low beam illumination module, a vehicle lamp and a vehicle. The low beam optical module includes a lens, a light-shielding sheet and at least one light concentrating portion, wherein the light-shielding sheet includes a light-shielding sheet body; an upper edge of a front end of the light-shielding sheet body is provided with a low beam cutoff line structure; a front end surface and the rear end surface of the light-shielding sheet body are transparent; the light concentrating portion is connected to a rear end of the light-shielding sheet; the lens is arranged in front of the light-shielding sheet; and an outer contour surface of the at least one light concentrating portion is engaged with a lower surface of the light-shielding sheet body, so that the light-shielding sheet body can receive emitted light of the light concentrating portion and refract the light from the front end surface to the lens, and then the light is projected to form a low beam region III beam shape. The disclosure further provides a low beam illumination module, a vehicle lamp and a vehicle including the above low beam optical module. The low beam optical module of the disclosure can form a low beam region III beam shape without affecting the low beam shape, and achieves light weight.