Pollen characters and fertility of 42 kinds of cultivars and wild types of Pyrus ussuriensis was studied.The results showed that pollen grain was oval or oblong,and the male sterility phenomenon was obviously.23 cultivars showed male sterility,i.e.,anther was abortive,which accounting for 54.8%.There was a large difference between two pollen viability determination methods,I-KI and culture medium.Culture medium determination method was more accurate.Viable pollen could be got by putting flower cluster in the greenhouse,but the pollen fertility was low.