The invention belongs to the technical field of composite material forming technologies and particularly relates to a manufacturing method for composite material forming molds with composite structures. According to the manufacturing method, aiming at the problems that large and precise composite material part forming molds are low in forming accuracy, high in manufacturing cost and short in service life, through mold digital analogy, composite material mold supports are machined and connected in an assembled mode; according to mold molded surface CAD digital analogy, by using a material increasing manufacturing method, mold metal molded surfaces and molded surface and support assembly components are stacked layer by layer and machined; through a numerical control machine tool, the mold molded surfaces and molded surface and support assembly components are subjected to rough machining; the mold molded surfaces and the supports are connected in an assembled mode through the self locking components; and the assembled molds are subjected to molded surface finish machining, and the composite material forming molds with the composite structures are manufactured. The manufacturing method for the composite material forming molds with the composite structures is suitable for manufacturing of the composite material forming molds with the composite structures.