Abstract: Pollen viability was observed by culture method. Cross compatibility among different cultivars was determined using fluorescence microscope. Fruit setting rate resulted from different combinations of crossing was calculated. Results showed that the sequency of male kiwifruit trees pollen viability of four cultivars from the highest to the lowest was Chuyuan M4，Xiangping 83-3，Jinkui and Kuimi. Crossing among these cultivars resulted in a quick recognition reaction，more pollen attachment，and high compatibility，germination and fruit setting rate. Among the 24 crossing combinations，Jinkui × Chuyuan M4 produced the highest compatibility index（924.61） with 94.44% of fruit setting rate，while the lowest compatibility was observed in Zaoxian × Jinkui（417.44 of compatibility index and 71.11% of fruit setting rate）. These data demonstrated that cross compatibility and fruit setting rate varied among different cultivars，and cross compatibility index had close correlation with fruit setting rate. Therefore，the selection of pollinizer has significant importance in practical production of kiwifruit.

Key words: kiwifruit, pollen vitality, compatibility, fruit setting rate