Abstract: Pollen vitalities of 15 species of Dendrobium were determined.The fruit-bearing rate of the orchids affected by the artificially induced self-or cross-pollination was investigated.The results showed that the pollen vitalities of the species varied from 38%to 79.3%.The fruit-bearing rate ranged 0-73.3% by self-pollination,and0-86% by cross-pollination.There was no significant correlation found between the pollen vitality and fruit-bearing among the various species.