The invention relates to rheumatism expelling bath salt and a preparing method thereof. The rheumatism expelling bath salt comprises, by mass, 80-110 parts of anhydrous sodium sulfate, 2-8 parts of potassium chloride, 4-12 parts of sodium stearate, 15-25 parts of ethyl nicotinate, 30-40 parts of beta-lactose, 25-35 parts of sodium chloride, 10-19 parts of fat alkylamide propyl dimethyl amine oxide, 1.5-6.5 parts of kojic acid, 0.1-0.5 part of pigment, 2-5 parts of jasmine essence, 4-9 parts of carboxy methyl cellulose, 12-20 parts of Chinese starjasmine stem, 10-18 parts of loofah sponge and 8-15 parts of long-noded pit viper. The bath salt can be used for effectively removing dirt on the surface of the skin to make the skin become white, tender, smooth and rich in elasticity, meanwhile, the effect of expelling rheumatism is achieved, and after the bath salt is used for a long time, generation and relapses of rheumatism can be prevented effectively, and rheumatism can be effectively treated.