Objective: To investigate the effect of TA bacterial reverse mutation for Yang .ling Zhong Yu Decoction, It is able to open out its genetic toxicity. Methods:To adopt mixing into utensil means, we probe into vitro TA bacterial reverse mutation for Yang Jing Zhong Yu Decoction in differ doses, and observe the DNA variety of TA bacteria. Results : under mixing into S9 or non- mixing into S9 ,We adopt Yang Jing Zhong Yu Decoction in differ doses ,it is't affected to TA bacterial reverse mutation for Yang Jing Zhong Yu Decoction. Conclusion:th...