Abstract: The study aims to explore the effects of short- term flooding (including submergence and waterlogging) on the growth and regrowth of Myricaria laxiflora. Under the simulated condition in laboratory, the cutting seedlings were submerged or waterlogged for 20 days, and then were emerged for 20 days’regrowth, to analyze the morphological and physiological characteristics. The results showed that: (1) After flooding 20 d, the increment of the primary branch length and secondary branch number of submergence plant were significantly lower than CK. There were no significant difference of the increment of the primary and secondary branch number between submergence plant and CK. However, the increment of the primary branch length of submergence plant was higher than CK after regrowth 20 d. At the end of flooding and regrowing, there was no significant difference of the increment of the primary branch length and number and secondary branch number between waterlogging plant and CK. (2) At the end of flooding, the contents of total chlorophyll, root soluble sugar and root starch of submergence plant were significantly lower than CK, but there was no significant difference of them after regrowth 20 d. At the end of flooding and regrowth, there was no significant difference of all morphyological and physiological indicators between waterlogging plant and CK, except for the fact that the root soluble sugar content was significant higher than CK at the end of flooding. The conclusions demonstrated that submergence inhibited the growth of aboveground and the accumulation of chlorophyll and root carbohydrate, and the quick regrowth and re-accumulation were appeared after plant’s being emerged, while waterlogging showed no significant effect on the growth and recovery of the plant.