Investigations were made of dynamic change in phytohormones, including abscisic acid (ABA), indole-3-acetic acid (IAA), gibberellins (GAs) and cytokinis (CTKs) and their effects on the physio- biochemistry in and morphology of rice of three different cultivars, i. e., "Shanyou63" (Sy63), Wuyujing (Wyj) and upland rice "85-15" (85-15) grown in upland soil. The content of ABA increased as compared with that in the CK (waterlogged) and the dynamic change in ABA in rice of different cultivars followed some rules. And the dynamic change in GAs was similar to that in ABA. IAA decreased in roots and increased in leaves at the beginning of the stress period. The change in CTKs content was similar to that in IAA. The results suggested that on the upland soil the act ion of stoma of rice was controlled by IAA as well as ABA and the development of lateral roots was related to the increase in endogenous IAA and the decrease in endogenous CTKs in root.