Disclosed by the present invention is an intraocular lens semi-finished product forming mold, comprising a first mold and a second mold； the first mold comprises a first optical region and a first auxiliary region, and the second mold comprises a second optical region and a second auxiliary region； a step surface is provided at a connection position between the first optical region and the first auxiliary region, an end of the step surface being connected to the first optical region by means of a step extension surface, while the other end of the step surface is connected to the first auxiliary region； the height difference of the step surface is greater than zero, and the distance between the step surface and an edge of the first optical region is greater than zero； and the second auxiliary region and the second optical region are connected by means of a tapered inclined surface. Further disclosed in the present solution is a forming method using the described forming mold, as well as an obtained intraocular lens semi-finished product. In the present solution, a step surface and a tapered inclined surface are provided so that an intraocular lens directly forms a transition step when formed in the forming mold, which simplifies the production process and improves the production efficiency, and may effectively reduce the thickness of a crystal while satisfying mechanical properties.La présente invention concerne un moule de formation de produit semi-fini de lentille intraoculaire, comprenant un premier moule et un second moule ； le premier moule comprend une première région optique et une première région auxiliaire, et le second moule comprenant une seconde région optique et une seconde région auxiliaire ； une surface étagée est disposée au niveau d'une position de connexion entre la première région optique et la première région auxiliaire, une extrémité de la surface étagée étant reliée à la première région optique au moyen d'une surface d'extension étagée, tandis q
