Insert structure of product with concave structure on inner wall

The utility model belongs to the technical field of product mold structures, and particularly relates to an insert structure of a product with a concave structure on the inner wall, which comprises a first mold block, a second mold block arranged at the upper end of the first mold block, a shell arranged at the upper end of the second mold block, a rotating handle arranged on one side of the shell, a worm arranged at one end of the rotating handle, and a second mold block arranged at the other end of the worm. A worm gear is arranged on one side of the worm, the worm rotates to drive the worm gear to rotate, the worm gear drives the first gear to rotate, the first gear drives the transmission shaft to rotate, the transmission shaft drives the screw to rotate, the screw is screwed into the second module and the first module, and therefore the purposes that the second module and the first module are rapidly and fixedly connected, and the second module is attached to the first module are achieved. The square blo