Objective:To investigate whether Chinese traditional medcine improve survival rate of limited stage small cell lung cancer(LS-SCLC) patients after conventional chemoradiotherapy.Method: Seventy patients with LS-SCLC treated without surgery were randomized into two groups.The control group 35 examples treated by chemoradiotherapy

35 cases of patients in the research group treated based on chemoradiotherapy plus Chinese Medicine

XIDAN soup was given by mouth during strengthen phase

consolidation phase and maintenance phase.Result:The overall 1-

2-

3-

5-year survival rates of LS-SCLC patients in the control group and experimental group were 74.3%

31.4%

14.3%

11.4% and 77.1%

40.0%

28.6%

22.9% respectively

and the median survival for two groups were 16.1 months and 22.3 months respectively.The difference of survival rate at years 2

3

5 in two groups had statistically significance(P<0.05).But the difference of gastrointestinal reactions and myelosuppression atⅠ

Ⅱ levels during strengthen phase in two groups had no statistically significance(P>0.05).Conclusion:Chinese medcine treatment after conventional chemoradiotherapy can improve the survival rate and lengthen the survival time of LS-SCLC patients without increasing toxic side effects.