Method and machine (10) for producing capsules of cosmetic products, preferably lipsticks. The method includes a step of introducing (2000) a base volume of a cosmetic product into a melting and preparing the machine to melt and prepare cosmetic products, and a subsequent step of injecting (2020) a predetermined and melted portion of the base volume of cosmetic product by injecting elements (160) of the machine (10) into a containment capsule (200) of the predetermined portion of the base volume of cosmetic product; the containment capsule and the predetermined portion of cosmetic product making up a semifinished product of the cosmetic product designed to be subjected to subsequent steps of working and morphological processing before its final use by an user.