The utility model relates to a laser light source combination system. The system comprises a first laser transmission channel, a second laser transmission channel, a dichroic mirror and a convergent lens system, wherein a first color laser beam is input into the first laser transmission channel and transmitted through the dichroic mirror; a second color laser beam and a third color laser beam are input into the second laser transmission channel, incident on the dichroic mirror, reflected by the dichroic mirror, and combined with the first color laser beam transmitted through the dichroic mirror into one beam; and the beam is output by the convergent lens system, the first color laser beam, the second color laser beam and the third color laser beam respectively being a red laser beam, a green laser beam and a blue laser beam. The system provided by the utility model can reduce the lighting area of a light spot input into a light unifier system by half, and can effectively improve the distribution of the light field.