本发明公开了一种制备5-羧酸甲酯-6-甲氧基苯并三氮唑的方法,以2-甲氧基-4-氨基苯甲酸甲酯为原料,加入溶解量的醋酐和冰醋酸,加入硝化量的浓硝酸,硝化反应制得中间体2-甲氧基-4-氨基-5-硝基苯甲酸甲酯;以2-甲氧基-4-氨基-5-硝基苯甲酸甲酯为原料,加入溶解量的甲醇、催化量 The invention discloses a method for preparing methyl 5-carboxymethyl-6-methoxybenzotriazole. The method comprises the following steps: taking methyl 2-methoxy-4-aminobenzoate as raw material, adding dissolved acetic anhydride And glacial acetic acid were added nitration amount of concentrated nitric acid, nitration reaction intermediate 2-methoxy-4-amino-5-nitrobenzoate; 2-methoxy-4-amino-5-nitro Methyl benzoate as raw material, dissolved in methanol, the catalytic amount