The utility model discloses a top-blown sedimentation electric furnace flue. The top-blown sedimentation electric furnace flue comprises an ascending flue body, a descending flue body and a horizontal flue body which are mutually connected. A membrane type wall flue is arranged on the descending flue body in a parallel mode, the inlet end of the membrane type wall flue is connected with the top end of the ascending flue body, and the outlet end of the membrane type wall flue is connected with the horizontal flue body. According to the top-blown sedimentation electric furnace flue, the membrane type wall flue is arranged in an existing descending flue in the parallel mode, so the temperature at a flue gas outlet can be reduced to be 310-350 DEG C and can meet the production requirement that the designed temperature of inlet flue gas of an electrostatic precipitator is 300-350 DEG C, and the problem of corrosion can be solved. Meanwhile, a butterfly valve is arranged at the inlet end of the membrane type wall flue, the membrane type wall flue and an original flue can be switched and mutually serve as spare flues, and therefore a production halt is not needed during maintenance. In addition, process technological requirements can be met without arranging operation equipment. The top-blown sedimentation electric furnace flue is simple in structure, high in practicability, good in application prospect and high in use value.