The invention relates to a method for treating the sanitary sewage of encampments, which is characterized in that: a contact anaerobic basin (2), a plugflow aeration basin (3) and a sewage pit (7) are connected by a pipeline, ball-shaped biological contact filter material (4) is filled in the contact anaerobic basin (2) and the plugflow aeration basin (3), a liquid lower jet aeration pump (6) is arranged in the plugflow aeration basin (3), after the treatment, water undergoes deep treatment in the sewage pit (7); the plugflow aeration basin (3) adopts liquid lower plugflow aeration, the liquid lower jet aeration pump (6) is provided with an air ejector at the outlet, air-water mixture jet is formed, strong backset is formed in the basin, when oxygen is dissolved, strong stirring to the biological contact filter material (4) at the bottom facilitates partial biological filling to convolute and turn over and move freely, fluidizaton state is formed, and air, water and filling produce onflow among the three and contact fully. The treatment method is characterized by short time of construction, low investment, quick effect, flatly buried original place when encampments are relocated and no pollution to environment.