The invention relates to the field of vehicle lighting equipment and discloses a motor vehicle lighting optical module. The motor vehicle lighting optical module comprises a supporting frame (1), a bearing (2), a leaf spring (3), a rotary small assembly (4), an AFS motor (5), a rotary shifting rod (6), a rotary supporting plate (7) and a light dimming support (8). The supporting frame (1) is usedfor supporting a rotary assembly. The leaf spring (3) is used for fixing the bearing (2) to prevent the bearing (2) from coming off. The AFS motor (5) drives the rotary pulling rod (6) to drive the rotary small assembly (4) to rotate. A light source rotates along with the rotary small assembly (4). By adopting the motor vehicle lighting optical module, the lighting dead angles of a vehicle duringcurve traveling are eliminated. Meanwhile, part of the light source is controlled to automatically flame out to achieve the effect of preventing dazzling high beams.