The invention relates to 'a compound
vegetation wetland sewage treatment system that has comprehensive benefits' which belongs to the field of
sewage treatment. The invention is characterized in that: the compound
vegetation includes cattail, wild rice stem, water shallot,
calamus (dominated by cattail). Two rows of the cattail are spaced by a row of wild rice stem, water shallot or
calamus. The invention adopts the cattail, the wild rice stem, the water shallot and the
calamus that are easy to be obtained and survive, low in cost and needs no care and gravel base to construct an undercurrent type artificial
wetland system, which can not only purge the domestic
sewage from urban and rural areas efficiently but also achieve a high overall benefit of compound
vegetation and can enhance the landscape effect of the
wetland, and develop the application in food,
medicine and braiding product. The wetland
system provided by the invention can keep a long-term and stable decontaminating effect and is characterized in that the purifying effect is prominent, the construction project is easy, the operation cost is low and the
weed invasion is less, the landscape effect is good, the overall benefit is good and the development potential is large, which meets the practical conditions of the country and is suitable for being generalized in a large scale.