This paper deals with the whole process of meiosis of pollen mother cells and the formation of male gametophyte in Clivia miniata Regel. Observations indicated that simultanecus type and successive type exist simultaneously in the cytokinesis. It was found that normal tetradsof tetraploid Clivia miniata Regel are usually produced in the process of meiosis, but there are amitosis in some nuclei of microspores. The correlations between meiosis, Phase and lenth of flower-buds were studied, and incomplete synchronism of meiosis was observed in the experiment。