Positioning structure for conveniently recovering mold to starting point

The invention relates to a positioning structure for conveniently recovering a mold to a starting point. The positioning structure comprises a mold forming assembly which is internally provided with a forming cavity, and a thread forming piece for forming a thread part of a product, wherein a thread forming part for forming a product thread is arranged above the thread forming piece; and a gear positioning device is arranged under the thread forming piece, and the gear positioning device is used for recovering the thread forming piece to a starting position after mold stripping. After the mold stripping, only a gear rack needs to be recovered to the position before the mold stripping, so that the mold is recovered, the positioning is accurate and the adjustment is convenient; the structure can be used for formation and mold stripping of the product which is internally reversed, and comprises an inner forming piece, a middle forming piece which sleeves the inner forming piece, and an outer forming piece which sleeves the middle forming piece; and the structure is relatively simple, and the product which is internally reversed can be smoothly stripped from the mold.