Sulige gas field is a typical tight lithologic gas reservoir with low-pressure, low-permeability and low-abundance. With its development deepening, several problems about the gas well production largely appear, such as formation pressure, gas well productivity and wellbore fluid carrying capacity gradually decreasing, causing production and even water flooding shut down of gas wells, which seriously affects the problem, the drainage gas production technology must depend on the formation energy of the gas well itself. Therefore, in order to effectively remove the well bore fluid accumulation and resume normal production, the principle and technical characteristics of low-pressure gas–liquid mix-conveying technology are studied and the field test was carried out in Sulige gas field. The results show that the gas–liquid mix-conveying technology is reliable and feasible. The result of field test is remarkable, which can effectively remove liquid accumulation in well bore and provide certain technical support for drainage gas production of low production gas wells in Sulige gas field. However, the technology is still in the field test stage, it still needs to further strengthen the theoretical research and field demonstration.