Method for preparing 3-amino-2-methyl benzoic acid

The invention discloses a method for preparing 3-amino-2-methyl benzoic acid. The method comprises the following steps: by using 3-nitryl-2-methyl benzoic acid as a raw material, salifying; and carrying out liquid phase catalytic hydrogenation to prepare the 3-amino-2-methyl benzoic acid. The method for preparing 3-amino-2-methyl benzoic acid provided by the invention is environmentally friendly and wide in application range, and many different solvents can be selected as liquid phases. The method is simple in post-treatment process and free from purification and is just filtered and dried after acidification. The product purity can reach over 99% and the yield is high (over 95%).