Totally 102 cases（ 220 times of clinical visits） of stomachache diagnosed and treated by Prof. XU Jingshi were collected and the medical information was extracted to establish a database. The data processing system

frequency counting and complex network were used for data mining. The common symptoms of stomachache patients were poor sleep

belching

acid reflux and flatulence in turn besides stomach ache. The common TCM syndromes of stomachache were liver stagnation and spleen deficiency

disharmony of stomach qi and disharmony of liver and stomach. The common therapies were regulating liver and stomach

opening depression and arousing spleen and supporting earth（ spleen and stomach） and repressing wood（ liver）. The commonly used formulas were Xiaohua Funing Decoction（ 消化复宁汤）

Danshen Drink（ 丹参饮） and Huanglian Wendan Decoction（ 黄连温胆汤）. The commonly used herbs were Zhuru（ Caulis Bambusae in Taenia）

Lyuemei（ Mume Flos） and Zhiqiao（ Fructus Aurantii）. The complex network analysis diagram showed that Zhuru

Lyuemei

Huanglian（ Rhizoma Coptidis）

Zhiqiao and Suanzaoren（ Semen Ziziphi Spinosae） were the core herbs in the prescriptions

especially Zhuru.