Abstract: Microsporogenesis and formation of pollen in Chimonanthus praecox L.are studied,the results are as follows:the microspore mother cells are derived from the multiple line sporogeneous tissue.The cytokinesis of pollen mother cells conforms to simultaneous type and the arrangement of microspores in a tetrad is tetrahedral.In the early stage of the microspore,it shows the change of vacules.The mature pollen grain is 2-celled.The type of anther wall is dictyledonous.The anther wall is composed of 5-6 layer cells and the tapetum is glandular.The pollen development has its dimorphism.