NOVELTY - 2,6-Dimethyl phenol is reacted with epoxypropane in presence of triethylamine as catalyst, and hydroxypropylated to obtain (2,6-dimethylphenoxy)isopropyl alcohol. Obtained product is sulfonylated with methanesulfonylchloride or p-toluenesulfonyl chloride in presence of triethylamine to obtain 1-(2,6-dimethyl phenoxy)isopropylmethanesulfonate or 1-(2,6-dimethylphenoxy)isopropyl p-toluenesulfonate. Resultant product is reacted with ammonia to obtain 1-(2,6-dimethylphenoxy)isopropyl amine. Obtained product is dissolved in hydrochloric acid to obtain mexiletine hydrochloride.    USE - Manufacturing mexiletine hydrochloride.    ADVANTAGE - The method efficiently provides mexiletine hydrochloride having yield of 45% or more and purity of 99.5%, by simple method without affecting the environment.    DETAILED DESCRIPTION - 2,6-Dimethyl phenol, epoxy propane and triethylamine are mixed in the mass ratio of 1:(0.47-0.72):(0.04-0.08), dissolved in alcohol solvent (a), heated at 60-100 degrees C for 2-6 hours, distilled after reducing pressure to separate out alcohol, triethylamine and 1-(2,6-dimethyl phenoxy)isopropyl alcohol. Methanesulfonic acid chloride as sulfonating agent is mixed with (2,6-dimethylphenoxy)isopropylalcohol, dissolved in alcohol solvent (b), cooled at 0 degrees C, and triethylamine is added at 0-35 degrees C. The mass ratio of 1-(2,6-dimethylphenoxy)isopropyl alcohol, methyl sulfonic acid chloride and triethylamine is 1:(0.63-0.95):(0.56-0.84). The obtained mixture is stirred continuously for 30-60 minutes, filtered and filter cake is washed with organic solvent. Filtrate is contacted with cleaning solution to obtain organic phase. The organic phase is washed with water, dried and the solvent is evaporated to obtain colorless transparent liquid 1-(2,6-dimethyl phenoxy)isopropylmethanesulfonate. When sulfonylation reagent is toluene sulfonic acid chloride, then toluene sulfonic acid chloride is mixed with 1-(2,6-dimethylphenoxy)isopropylalcohol, dissolved in alcohol solvent (b), cooled to 0 degrees C, and triethylamine is added at 0-35 degrees C. The mass ratio of 1-(2,6-dimethylphenoxy)isopropylalcohol, p-toluene sulfonyl chloride and triethylamine is 1:(1.06-1.59):(0.56-0.84). The obtained mixture is stirred continuously for 30-60 minutes, filtered, and the filter cake is washed with organic solvent (b). The obtained filtrate is contacted with cleaning solution, and resultant organic phase is washed with water, dried and the solvent is evaporated to obtain 1-(2,6-dimethylphenoxy)isopropyl p-toluenesulfonate as white needle crystals. 1-(2,6-Dimethyl phenoxy)isopropylmethanesulfonate or 1-(2,6-dimethylphenoxy)isopropyl-p-toluenesulfonate is mixed with liquid ammonia. The mass ratio of 1-(2,6-dimethylphenoxy)isopropylmethanesulfonate and liquid ammonia is 1:0.33-1. The mass ratio of 1-(2,6-dimethylphenoxy)isopropyl p-toluenesulfonate and liquid ammonia is 1:0.25-0.77. 1-(2,6-Dimethyl phenoxy)isopropylmethanesulfonic acid ester or 1-(2,6-dimethyl phenoxy)isopropyl p-toluene sulfonate is dissolved with alcohol solvent (c), reacted at 80-120 degrees C for 8-10 hours, and solvent is distilled. Remainder of the mixture is dissolved in solvent (d), washed with alkaline solution of 1-(2,6-dimethylphenoxy)isopropylmethanesulfonate or 1-(2,6-dimethylphenoxy)isopropyl p-toluene sulfonate in the volume ratio of 1:3.8-5.8, and the organic phase is dried. The solvent (d) is evaporated by mixing with hydrochloric acid to obtain mexiletine hydrochloride crude product. The obtained crude product is dissolved in an alcohol solvent (e) in the mass ratio of 1:1-3, and activated carbon is added for discoloration. Anhydrous organic solvent is then added to the resultant mixture, and white crystals are separated, and washed with anhydrous organic solvent (f) to obtain mexiletine hydrochloride. The volume ratio of solvent and alcohol solvent (e) is 1:(5-10).