A method for preparing a urate transporter 1 inhibitor, 2-((5-bromo-4-((4-bromonaphthalen-1-yl)methyl)-4H-1,2,4-triazol-3-yl)thio) acetic acid represented by the formula ZXS-BR, comprising the following steps: 1) performing a bromination reaction of N-bromosuccinimide and starting material A' to obtain product B'; preferably, the solvent for the reaction is acetonitrile, and the reaction temperature is from 30 to 40°C; 2) reacting product B' obtained from step 1) with N-bromosuccinimide in the presence of a radical initiator to obtain product C'; 3) reacting product C' obtained from step 2) with a thiocyanate at a temperature no lower than 100°C to obtain product D; 4) reacting product D obtained from step 3) with formylhydrazine to obtain product E; preferably, the solvent for the reaction is tetrahydrofuran; 5) performing a ring closure reaction of product E obtained from step 4) in the presence of a base to obtain product F; preferably, the base is an alkali metal carbonate or an alkali metal hydroxide, more preferably, Na 2 CO 3, K 2 CO 3, NaOH or KOH; 6) reacting product F obtained from step 5) with XCH 2 CO 2 R in the presence of a base to obtain product G'; wherein, X is selected from Cl, Br or I, R is selected from C 1 -C 10 alkyl or C 3 -C 6 cycloalkyl; preferably, R is selected from C 1 -C 4 alkyl; more preferably, R is selected from methyl or ethyl; 7) reacting product G' obtained from step 6) with N-bromosuccinimide to obtain product H'; 8) hydrolyzing product H' obtained from step 7) in the presence of a base to obtain ZXS-BR; preferably, the base is selected from an alkali metal hydroxide; more preferably, the base is selected from LiOH, NaOH or KOH; wherein, the formulas A', B', C', D, E, F, G', H' and ZXS-BR represent the compounds represented by the following formulas, respectively: 1) performing a bromination reaction of N-bromosuccinimide and starting material A' to obtain product B'; preferably, the solvent for the reaction is acetonitrile, and the reaction temperature is from 30 to 40°C; 2) reacting product B' obtained from step 1) with N-bromosuccinimide in the presence of a radical initiator to obtain product C'; 3) reacting product C' obtained from step 2) with a thiocyanate at a temperature no lower than 100°C to obtain product D; 4) reacting product D obtained from step 3) with formylhydrazine to obtain product E; preferably, the solvent for the reaction is tetrahydrofuran; 5) performing a ring closure reaction of product E obtained from step 4) in the presence of a base to obtain product F; preferably, the base is an alkali metal carbonate or an alkali metal hydroxide, more preferably, Na 2 CO 3, K 2 CO 3, NaOH or KOH; 6) reacting product F obtained from step 5) with XCH 2 CO 2 R in the presence of a base to obtain product G'; wherein, X is selected from Cl, Br or I, R is selected from C 1 -C 10 alkyl or C 3 -C 6 cycloalkyl; preferably, R is selected from C 1 -C 4 alkyl; more preferably, R is selected from methyl or ethyl; 7) reacting product G' obtained from step 6) with N-bromosuccinimide to obtain product H'; 8) hydrolyzing product H' obtained from step 7) in the presence of a base to obtain ZXS-BR; preferably, the base is selected from an alkali metal hydroxide; more preferably, the base is selected from LiOH, NaOH or KOH; wherein, the formulas A', B', C', D, E, F, G', H' and ZXS-BR represent the compounds represented by the following formulas, respectively: