The invention relates to a combined type ecological floating
bed water purifying device used for in-situ purification treatment of polluted water in rivers and lakes. A floating
body frame of a floating
bed is provided with a grid-like
bamboo charcoal floating
bed main board made of
bamboo charcoal pieces which are processed intensely by a compound
enzyme biological
promoter before being used, and when the
bamboo charcoal pieces are used, the bamboo
charcoal pieces can quite well adsorb
nitrogen and
phosphorus in the water and effectively promote the attached growth of
indigenous microorganisms in the water; grid holes on the bamboo
charcoal floating bed main board are used as planting holes of plants, and various aquatic plants or economic plants with water purification function can be mixedly planted; and biological fillers are arranged on the lower part of the floating bed, and
biomass-based materials which are natural
vegetable fibers are used by
biofilm formation of microorganisms. The device can greatly improve the capability of removing
nitrogen,
phosphorus and organic matters from the
eutrophication water of the ecological floating bed device and has the characteristics of simple structure, convenient mounting and control, high
water flow impact resistance and the like, so that the device is quite suitable to be used for the in-situ purification treatment of water in natural rives, lakes and reservoirs and scenic water.