The utility model relates to a snakelike formula fluidized bed heat exchanger in fluidized bed technology field, it mainly comprises casing, steam outlet, the import of the grey granule of heat, the grey granule of heat, coiled pipe, foraminiferous swash plate, fluidization air intlet, cold grey grain exports A, cold grey grain exports B, water inlet and hot -air export. The upper portion of casing is equipped with hot -air export, steam outlet and water inlet, and the lower part is equipped with cold grey grain exports A, foraminiferous swash plate and fluidization air intlet, and the middle part is equipped with cold grey grain exports B, coiled pipe and the import of the grey granule of heat, inside the coiled pipe was located the casing, water got into from the left end of coiled pipe, and right -hand member steam outlet flows. The utility model discloses convenient to use is swift, simple structure, low in cost.