Objective:To evaluate therapeutic and adverse effects of Tanreqing Injection for treatment of acute radiation pneumonia.Methods:Sixty-nine cases were randomly divided into two groups.The treatment group（n=35） was treated with dexamethasone

levofloxacin and Tanreqing injection

and the control group （n=34） was treated with dexamethasone and levofloxacin

both for two weeks.Results:The total effective rate and the markedly effective rate in the treatment group were higher than those in the control group

with a significant difference between the two groups in the markedly effective rate（P<0.05）. The adverse effect was 35.29% in the control group and 31.43% in the treatment group with no significant difference[WTBX]（P>0.05）.Conclusion:Tanreqing Injection is safe and effective for adjuvant treatment of acute radiation pneumonia.