RGB light mixing structure with polarized light and lamp

The invention discloses an RGB light mixing structure with polarization and a lamp. The RGB light mixing structure with the polarized light comprises an RGB LED light source, a spreadlight lens, a light shielding structure and a shell, the light shielding structure is provided with a first light shielding part and a second light shielding part which are separated from each other, and the first light shielding part and the second light shielding part jointly form an adjustable hole in the side, away from the RGB LED light source, of the spreadlight lens. And the adjustable open hole is used for limiting the irradiation of the mixed light beam to a preset range and adjusting the size of a light spot. The RGB light mixing structure with the polarization function and the lamp have the beneficial effects that through mutual combination of the spreadlight lens and the light shading structure, on the premise that certain light intensity is maintained and dispersion is eliminated, a multi-color-point light source can