Hand-held measuring instrument certification automatic generator

The utility model relates to the technical field of certification automatic generators, and discloses a handheld measuring instrument certification automatic generator, which comprises a first shell and a second shell, the bottom end of the first shell is fixedly connected with a connecting grip, and the inner side of the first shell is fixedly connected with a connecting limiting frame; through the arrangement of a fixed positioning block, a movable clamping block, a connection limiting mechanism, a movable screw rod and a connection rotating disc, the connection rotating disc can conveniently drive the movable screw rod to rotate, so that the bottom end of the movable screw rod can be pulled out from the interior of the movable clamping block, and a second shell drives a movable connecting rod, the fixed positioning block and the movable clamping block to move; the movable connecting rod can move on the inner side of the connecting limiting frame, the end of the movable clamping block is disengaged from the