Objective:In order to guide cross breeding and artificial pollination. Method: We studied effects of plant growth regulators on pollen germination and tube growth in Amomum kravanh with pollen in vitro . Result: The results showed that: different plant growth regulators have a different effect on pollen germination and pollen tube growth in vivo . 6-benzylaminopurine (6-BA)

GA showed a strong inhibitory effect on pollen germination and pollen tube growth in all concentrations of the experiment in A. kravanh; naphthylacetate can promote the pollen germination and pollen tube growth at a concentration of 0.5 mg·L-1; the promotion concentration for boric acid is at 100-200 mg·L-1 range

the optimal concentration is 100 mg·L-1; paclobutrazol inhibits pollen germination in A. kravanh

inhibitory effect weakened with the increased of paclobutrazol concentration

800 mg·L-1 concentration of paclobutrazol can promote pollen germination in A. kravanh. Conclusion: In the production practice

spraying a certain concentration of naphthyl acetic acid(NAA)

boric acid or paclobutrazol in the flowering period can promote pollen germination and pollen tube growth

and improve fruit set rate of Amomum Kravanh.