NOVELTY - Salt-containing organic wastewater is treated by using carrier fluid bed where air enters into a reaction tank via an air inlet at bottom part of fluid bed, and wastewater enters into the reaction tank via wastewater inlet on top part of fluid bed. The reaction tank of fluid bed is added with light weight high molecular biocarrier, which is made of polyethylene and/or polypropylene. The biocarrier is suspended on reaction tank in fluidization state. An aqueous phase microorganism is attached on surface of the biocarrier, which is fully contacted with wastewater to decompose the pollutant.    USE - Method for treating salt-containing organic wastewater.    ADVANTAGE - The biocarrier will not run off, is in a fluidization state, is fully contacted with nutriment and pollutant, and has good salt resistance and high treating efficiency.    DETAILED DESCRIPTION - Treatment of salt-containing organic wastewater comprises using carrier fluid bed where air enters into a reaction tank via an air inlet at bottom part of fluid bed, and wastewater enters into the reaction tank via the wastewater inlet on top part of fluid bed. The reaction tank of fluid bed is added with sphere or short column-shaped light weight high molecular biocarrier. The biocarrier is made of polyethylene and/or polypropylene, and has a density of 95-115 kg/m3, specific surface area of 500-650 m2/m3, void fraction of more than 90%, and filling density of 23-35 kg/m3 of the reaction tank volume. The biocarrier is suspended on the reaction tank in a fluidization state under the mixing pushing action of air flow and water flow. An aqueous phase microorganism is attached on surface of the biocarrier, which is fully contacted with the salt-containing organic wastewater to decompose the pollutant. The treated wastewater is then discharged from the wastewater outlet.    DESCRIPTION OF DRAWING(S) - The drawing is a perspective view of a carrier fluid bed used for treating salt-containing organic wastewater.