The invention relates to a sewage treatment method, which is applicable to the west area where the economic technology is comparatively backward and hilly small towns in Yangtze River Valley. The sewage passes through a grating and large suspensions are removed, then the sewage enters an anaerobic biological reaction tank, most solid suspensions and partial organic substances are removed, the effluent carrying oxygen in the air falls through multi-level from the elevation and flows into a water fall aeration tank at the lower part, and a part of the organic substances is removed; then the effluent enters an artificial rapid infiltration system, and pollutants such as the organic substances, nitrogen, phosphorus and the like are removed through the processes of interception, filtration, adsorption, nitration, denitrification and the like of a soil ecosystem; and finally, through ultraviolet disinfection, the effluent is discharged after reaching standards. The method has the characteristics of low energy consumption and expense, simple operation, maintenance and management, little sludge yield, good treatment effect, and the like.