A method of producing a catalyst for xylene isomerization, comprising: supporting a zeolite having a molar ratio of silica to alumina of 20-100 with a metal salt having an amount of a metal component of 0.05-5,0 wt% relative to the zeolite; mixing the zeolite supported with the metal salt with an inorganic binder to form a mixture powder so that a weight ratio of the zeolite to the mixture powder is 10-90 wt%; and supporting the mixture powder with a VIII group metal such that an amount of the VIII group metal is 0.001-3.0 wt% based on a total amount of the catalyst additionally supported with tin, bismuth or lead such that an amount of the tin, bismuth or lead is 0.01-5.0 wt% based on the total amount of the catalyst, wherein the metal salt is selected from the group consisting of beryllium nitrate, beryllium halide, beryllium acetate, beryllium naphthenate, beryllium gluconate, beryllium citrate, beryllium acetylacetonate, beryllium carbonate, beryllium formate, beryllium sulfate, beryllium hydroxide, magnesium nitrate, magnesium halide, magnesium acetate, magnesium naphthenate, magnesium gluconate, magnesium citrate, magnesium acetylacetonate, magnesium carbonate, magnesium formate, magnesium sulfate, magnesium hydroxide, calcium nitrate, calcium halide, calcium acetate, calcium naphthenate, calcium gluconate, calcium citrate, calcium acetylacetonate, calcium carbonate, calcium formate, calcium sulfate, calcium hydroxide, barium nitrate, barium halide, barium acetate, barium naphthenate, barium gluconate, barium citrate, barium acetylacetonate, barium carbonate, barium formate, barium sulfate, and barium hydroxide. supporting a zeolite having a molar ratio of silica to alumina of 20-100 with a metal salt having an amount of a metal component of 0.05-5,0 wt% relative to the zeolite; mixing the zeolite supported with the metal salt with an inorganic binder to form a mixture powder so that a weight ratio of the zeolite to the mixture powder is 10-90 wt%; and supporting the mixture powder with a VIII group metal such that an amount of the VIII group metal is 0.001-3.0 wt% based on a total amount of the catalyst additionally supported with tin, bismuth or lead such that an amount of the tin, bismuth or lead is 0.01-5.0 wt% based on the total amount of the catalyst, wherein the metal salt is selected from the group consisting of beryllium nitrate, beryllium halide, beryllium acetate, beryllium naphthenate, beryllium gluconate, beryllium citrate, beryllium acetylacetonate, beryllium carbonate, beryllium formate, beryllium sulfate, beryllium hydroxide, magnesium nitrate, magnesium halide, magnesium acetate, magnesium naphthenate, magnesium gluconate, magnesium citrate, magnesium acetylacetonate, magnesium carbonate, magnesium formate, magnesium sulfate, magnesium hydroxide, calcium nitrate, calcium halide, calcium acetate, calcium naphthenate, calcium gluconate, calcium citrate, calcium acetylacetonate, calcium carbonate, calcium formate, calcium sulfate, calcium hydroxide, barium nitrate, barium halide, barium acetate, barium naphthenate, barium gluconate, barium citrate, barium acetylacetonate, barium carbonate, barium formate, barium sulfate, and barium hydroxide.