The invention relates to a preparation method of sorafenib tosylate. The preparation method comprises the steps of reacting propylene chloroformate (5) with low cost and 4-chloro-3-trifluoromethyl phenylamine (2) with low cost to generate activated ester (6); reacting activated ester and 4-(4-aminophenoxy)-N-methyl-2-pyridine carboxamide (3) under the catalysis of N-methylpyrrolidine to obtain sorafenib with high yield; carrying out simple aftertreatment on the reaction to obtain sorafenib with relatively high purity; and then, reacting sorafenib and p-toluene sulphonic acid to generate the target product. The method is low in cost, simple in operation, few in reaction step, short in period, low in energy consumption, safe in process, free of high-toxicity reagents and suitable for industrial production, and the obtained product is high in yield and purity and free of potential safety problems.