Laser marking machine for optical instrument

The utility model relates to the technical field of laser marking machines, and discloses a laser marking machine for an optical instrument, which comprises a processing table, a processing groove for placing a to-be-processed object is arranged at the top of the processing table, an L-shaped supporting arm is arranged at the top of the processing table, and a sliding groove is vertically arranged on the inner side wall surface of the supporting arm. The top of the inner side of the sliding groove is vertically and downwards connected with a first telescopic rod, and the lower end of the first telescopic rod is connected with a laser marking machine body attached to the inner side wall face of the supporting arm. After an adjusting rod, a second telescopic rod, a connecting plate and a positioning assembly are matched for positioning, the output ends of two butt joint blocks are started to clamp and fix a to-be-marked object, and the situation that the object shakes and deviates in the marking process is prev