The utility model discloses a product heat treatment anti-deformation device which comprises a side plate, a baffle is fixedly connected outside the side plate, a sleeve is rotatably connected inside the baffle, and a groove is formed in one side, close to the baffle, inside the sleeve. According to the product heat treatment anti-deformation device, an adjusting plate is rotated to extrude a sliding rod through a chute, so that the sliding rod drives a sliding plate to move, then the sliding plate drives a
threaded rod to move, the
threaded rod retracts inwards and is separated from the sliding plate, and the position of the sliding plate can be directly moved; the threaded rods are controlled to be opened outwards by rotating the adjusting plate, the threaded rods are combined with the sliding plate, the six opened threaded rods are spliced into the lead screw, the lead screw can be driven to rotate by rotating the sleeve, the sliding plate is driven by the lead screw to be attached to a machined part, and therefore the machined part is fixed. Therefore, the situation that the sliding plate cannot be attached to the machined part is avoided, and the adaptability is higher.