Objective To explore Chinese medicine constitution type characteristics of autoimmune hepatitis（ AIH） patients’. Methods General information of 69 AIH patients was collected

including 53 simple AIH patients and 16 post-AIH cirrhosis patients. Patients’ Chinese medicine constitution types were decided by Chinese medicine constitution classification and decision table. The distribution of 9 types of Chinese medicine constitution of different genders and ages of AIH patients was analyzed. Results Among 69 patients

11 cases（ 15. 94%） were of single-constitution

58 cases（ 84. 06%） of accompanying-constitution. The top three types of constitution in simple AIH patients were Qi deficiency and Qi stagnation with blood stasis constitution（ 15. 09%）

Qi deficiency and Qi stagnation constitution（ 13. 21%）

as well as phlegm-dampness and Qi deficiency constitution（ 11. 32%）. The top three types of constitution in post-AIH cirrhosis patients were Yin deficiency and phlegm-dampness constitution（ 31. 25%）

Qi deficiency and Qi stagnation constitution（ 18. 75%）

as well as Yin deficiency and Qi deficiency with Qi stagnation constitution（ 18. 75%）. From the aspect of 9 constitution types

Qi deficiency（ 27. 83%）

Yin deficiency（ 20. 00%） and Qi stagnation（ 18. 26%） constitutions were common in simple AIH patients; while Yin deficiency（ 33. 34%）

Qi deficiency（ 24. 24%） and Qi stagnation（ 18. 18%） constitutions were common in postAIH cirrhosis patients. Simple AIH patients were compared with post-AIH cirrhosis patients. The distribution difference of constitution types of different genders and ages AIH patients was not significant（ P > 0. 05）. Conclusion Qi deficiency

Qi stagnation and Yin deficiency constitutions were common in AIH patients

which showed that dispersing the stagnated liver-energy

invigorating the spleen

nourishing Yin and softening the liver were important therapeutic methods to treat AIH in clinic.