15 main conventional rice in the pearl river delta region were chosen as the rice seed material in pot experiment,double factors random blocks design was adopted to study the effects of acid sulphate soil(ASS)improvement on different varieties of rice seeds yield and its component,tillering dynamic,drymatter production,root activity.The results showed that,the acid sulfate soil had obvious stress on rice.In nonimproved soil treatments,tillering was slow,growth stages delayed,dry matter accumulation decreased,fertile panicle number and filled grain decreased,eventually leading to yield reduction.This was more serious on late rice than early rice.Certain amount of soil amendments effectively improved the rice growth environment,increased the yield of rice.The yield of early rice increased by 20.4%~780.2% and late rice increased by 167.5%~2 651.5%.Rice varieties of YXY,TXZ,YJ2 and HFZ belonged to the acid resistance varieties,their performances were better than the other varieties in unimproved soil conditions.HYZ,YZZ and YHS belonged to the acid sensitivity varieties,their yields were higher than the other varieties after soil improvement.