The meiosis of pollen mother cells in lotus cv. Cunsanlian was cytologically observed by smear. The observations showed that the meiosis in the diploid lotus was successive and the tetavds formed bilaterally symmetric. After treated with colchicine,the lotus changed the number of chromosomes and produced the abnormal meiosis such as chromosomal ring,chromosome laggard,nonsynchronic meiosis and binucleolus.