The chlorophyll fluorescence parameters,peroxidase(POD),malondialdehyde(MDA),chlorophyll content,leaf water content and growth of Cassia bicapsularis seedlings were determined after treated with waterlogging stress.The results showed that with the increase of water depth,the injury of stress of Cassia bicapsularis plants gradually increased.After waterlogging treatment for 6days,severely flooded plants all died.After a month of waterlogging stress,Fo,Fv/Fm,qN of mild group and moderate waterlogging group plants decreased compared with the c...