The invention discloses an enhanced coagulation-gas stripping-membrane integration method for lightening membrane pollution. In the method, a coagulating agent and a coagulant aid are added into raw water and undergo enhanced coagulation reaction by applying hydraulic condition, and airflow circulation and lift treatment is performed while an external pressure hollow fiber membrane component is used for filtration. The invention also discloses an integration device designed according to the method. Through the technical measures of throwing the coagulating agent and the coagulant aid into the raw water, positioning gas stripping type aeration treatment under the filtering of the external pressure hollow fiber membrane component and the like, the method improves the pollutant removal rate and the water treatment effect, greatly lightens the membrane pollution, saves energy consumption of membrane component operation, prolongs the operating cycle of the membrane component, shortens the cleaning time, reduces the back washing cost, has small occupied area, low investment cost and simple and flexible implementation, is applicable to water treatment for large cities, and is also applicable to vast cities and towns and rural regions with imperfect water treatment process and small treatment scale.