Objective To explore the clinical diagnosis and treatment law of autoimmune hepatitis（ AIH） by analyzing the medical records of contemporary Chinese medicine physicians. Methods The medical records of Chinese medicine or integrative traditional and western medicine in diagnosing and treating AIH from January of 1990 to February of 2016 were searched from China National Knowledge Infrastructure

Chinese Biological Medical Literature Database

VIP Database

Wanfang Database and Famous Doctor Database of Guangzhou University of Chinese Medicine. Detailed information in the medical records

including Chinese medicine syndrome type

Chinese medicine syndrome elements of disease location

Chinese medicine syndrome elements of disease nature

and used herbs

was extracted. Data was analyzed with descriptive statistics

frequency analysis and cluster analysis. Meanwhile

core herb network map was drawn with complex network analysis. Results Totally

80 medical records were included.There were thirteen Chinese medicine syndrome types were involved in

and the top 3 syndrome types with the highest frequency of occurrence were static blood blocking collaterals（ 29）

internal retention of damp-heat（ 24） and stagnation of liver Qi and spleen deficiency（ 17）. There were thirteen Chinese medicine syndrome elements of disease nature were included

and the top 3 syndrome elements with the highest frequency of occurrence were blood stasis（ 33）

dampness（ 32） and heat（ 31）. There were twenty-eight prescriptions were involved in the records

and the top 3 prescriptions with the highest frequency of occurrence were Yinchenhao Decoction（ 茵陈蒿汤）（ 22）

selfdesigned prescriptions（ 20） and Chaihu Shugan San（ 柴胡疏肝散）（ 7）. Totally

169 herbs were used. The average herbs used in each record were 14. 6. The top 5 herbs with the highest frequency of occurrence were Yinchen [Herba Artemisiae Scopariae

茵陈]（ 45）

Gancao [Radix Glycyrrhizae

甘草]（ 42）

Chishao [Radix Paeoniae Rubra

赤芍]（ 37）

Chaihu [Radix Bupleuri

柴胡]（ 34） and Baizhu [Rhizoma Atractylodis Macrocephalae

白术]（ 31）.There were 84 herbs with the used frequency > 3

which could be classified into 9 categories by cluster analysis. By complex network analysis

the core herbs in treating AIH without jaundice were Chaihu

Baizhu

Baishao [Radix Paeoniae Alba

白 芍]

Fuling [Poria

茯 苓]

Gancao

Danggui [Radix Angelicae Sinensis

当 归] and Huangqi[Radix Astragali seu Hedysari

黄芪]; the core herbs in treating AIH with jaundice were Yinchen

Dahuang [Radix et Rhizoma Rhei

大黄]

Chishao and Huangqin [Radix Scutellariae

黄芩]. Conclusion In AIH

the common Chinese medicine syndromes include syndrome of static blood blocking collaterals and syndrome of internal retention of damp-heat

and the common Chinese medicine disease natures are blood stasis

dampness and heat. For the treatment

herbs that replenishing deficiency

clearing heat

diuresis

diffusing dampness

promoting blood circulation and removing blood stasis are mostly applied.