To sum up Professor Gan Aiping’s medication features in treating stomach sickness among senile patients. Methods： Professor Gan Aiping’s prescription to treat stomach sickness were sorted and summarized in terms of drug nature, flavors, channel entry, efficacy, dosage, and preparation. Results： The basic feature of medicine for treating spleen and stomach disease is with the nature of sweet and light. Tonifying spleen and boosting qi, nourishing yin and harmonizing stomach are roots for treatment; clearing heat and regulating qi, adjusting spirit and resolving depression are the key to get effectiveness; the choices of preparation including decoction, paste or pills depended on time and individuals; the common dosage was the best one for treating spleen and stomach disease. Conclusion： The core of Professor Gan Aiping’s treatment in stomach diseases among senile patients is "tonifying spleen and boosting qi, nourishing yin and harmonizing stomach ".