The invention discloses a continuous type rotary cooler for production of potash fertilizer, and relates to the technical field of potash fertilizer production equipment. The continuous type rotary cooler comprises a bottom plate, and the top of the bottom plate is sequentially and fixedly connected with a first fixing plate, a second fixing plate and a refrigeration box from left to right; clamping plates are fixedly connected to the top and the bottom of the right side of the first fixing plate and the top and the bottom of the left side of the second fixing plate; chutes are formed in the inner walls of the clamping plates, annular sliding blocks are slidably connected to the interiors of the chutes, and annular supporting plates are fixedly connected to the sides, away from the chutes,of the annular sliding blocks through connecting rods; and cooling barrels are fixedly connected to the surfaces of central holes of the annular supporting plates, annular racks are fixedly connectedto the bottoms of the surfaces of the cooling barrels, and discharging hoppers are fixedly connected to the bottoms of the cooling barrels. According to the continuous type rotary cooler for production of the potash fertilizer, the production time of the potash fertilizer is shortened, the labor intensity of workers is reduced, the efficiency of potash fertilizer production is improved, and greatmarket promotion significance is achieved.