Abstract: The development process of flower and fruit of feminization stamens of Capsicum annuum L. were conducted by the morphological and anatomical method and common plant paraffin section method. The morphological observation showed that, feminization bud was bigger than normal bud. Feminization stamens could fruit but the fruits were very small, and the small fruits were located at normal peduncle of pepper. It also found two mutants of some stamens feminization and all stamens feminization. According to the results of microscopic section, we knew that feminization stamen primordium presented leafy protrusions as flat, later developed into similar carpel thallus, forming the marginal placentation by edges conniventting or stitching together. In the process of feminization, stamens showed different levels of feminization, and showed a series of intermediate transition types. The other feminisation ovary冶with ovule and feminization stamens of the ovule were similar to those of normal ovary of the ovule.