The present application discloses a laser light source driving method, a laser light source and a laser projector, and belongs to the field of laser technology. The driving method includes: continuously outputting, by a first laser assembly, laser light in a first color during an output time interval of a ray in the first color; and during at least part of the output time interval of the ray in the first color, exciting a fluorescent sub-assembly with laser light in a second color to induce fluorescence in the first color, and outputting the fluorescence in the first color, the laser light in the second color being emitted by a second laser assembly.