The utility model discloses a calcium stearate catalytic reaction dryer. The calcium stearate catalytic reaction dryer comprises a feeding nozzle, a catalyst nozzle, an atomization nozzle, an annular hot air sucking pipe, a conduction oil heating jacket, a spraying and cooling chamber, a reaction drying chamber, an annular air cooling pipe, a cyclone cooling and settling device, a circulating air drying bed, a hot air blower, a steam absorption dryer and a hot air heater, wherein the feeding nozzle can spray out stearic acid and calcium hydroxide, the stearic acid and calcium hydroxide are mixed with a catalyst atomized and sprayed out by virtue of the catalyst nozzle for carrying out reaction, the annular air cooling pipe is in charge of rapidly cooling, solidifying and micro-granulating generated calcium stearate, settling, drying and then bagging. The calcium stearate catalytic reaction dryer provided by the utility model has the advantages that continuous production of calcium stearate can be realized, reaction speed can be improved through catalysis, calcium stearate granularity is refined through rapid mixed reaction, spraying and granulating, product purity is high, chromaticity is good, and automatic production of calcium stearate can be conveniently realized.