NOVELTY - Producing stearic acid from cottonseed oil is processed by settling cottonseed oil raw material, heating, washing liquid material with water, controlling temperature, water-washing, discharging water, carrying out acid hydrolysis of washed liquid using sulfuric acid solution, washing with water, draining water, carrying out hydrolysis of water and material liquid, reduced-pressure distilling, carrying out hydrogenation of material liquid with presence of palladium on activated carbon catalyst at 180-200 degrees C and 2-3 MPa for greater than or equal to 4 hours, and cooling to - 3 to - 6 degrees C.    USE - Process for producing stearic acid from cottonseed oil (claimed).    ADVANTAGE - The process improves product yield and stearic acid quality, removes impurity effectively, ensures continuity, produces product with deep color, reduces raw material consumption, and prevents environmental pollution.    DETAILED DESCRIPTION - Producing stearic acid from cottonseed oil is processed by settling cottonseed oil raw material for greater than or equal to 8 hours, pumping upper-layer liquid material in water-washing tank, heating to 50-60 degrees C, washing liquid material with water which is 4-6 wt.% of liquid material, controlling temperature at 50-60 degrees C, water-washing for 20 minutes, discharging water, carrying out acid hydrolysis of washed liquid at 45-55 degrees C for 3 hours using sulfuric acid solution in which concentration is 15-25% and amount is 10-20 wt.% of material liquid total weight, washing with water which is 4-6 wt.% of total material liquid weight at 45-55 degrees C for 20 minutes, draining water, carrying out hydrolysis of water and material liquid at 210-230 degrees C and 1.9-3.5 MPa for greater than or equal to 30 minutes in which weight ratio water:material liquid is 1:35-1:45, reduced-pressure distilling at 200-260 degrees C and 0.09-0.1 MPa, carrying out hydrogenation of 0.5-1.5 wt.% material liquid with presence of palladium on activated carbon catalyst which is 0.3-0.5 wt.% of material liquid at 180-200 degrees C and 2-3 MPa for greater than or equal to 4 hours, and cooling to - 3 to - 6 degrees C.