Abstract: The phenomenon which solution foaming will often take places at the absorption tower and regenera tion column in natural gas purification plant,that cause the H₂S concentration exceed the stipulated standards of product gas.This situation is even more prone to occur with the rising of temperature,especially in summer.Therefore,it is very important to analyze the main reason of solution foaming during operation,and put forward the corresponding preventive measures,these can ensure the plant’s running in an efficient,safe,stable and economical conditions.