Sapphire single crystal heat treatment device

The utility model relates to the technical field of sapphire crystals, in particular to a sapphire single crystal heat treatment device which comprises a heat treatment device body, a cooling assembly, a sliding plate, a plurality of clamping units and a base plate, each clamping unit comprises a positioning plate, a positioning insertion plate, a movable plate, a movable insertion plate and two springs, the movable plate can slide on the sliding plate, and the movable insertion plate can slide on the base plate. When sapphire is placed, the movable plate is pulled, the sapphire is placed between the movable plate and the positioning plate, then the movable plate is released, the sapphire can be clamped due to the pull-back effect of the spring, fixing of the sapphire is facilitated, and the sapphire can be placed conveniently. By means of the design, the problems that in the prior art, the clamping size of an installation frame needs to be manually adjusted, the needed time is long when many gems are machine