The invention discloses a method for preparing a benzamide compound and its intermediate. The method comprises the following steps: under protection by protective gas, in a polar aprotic solvent, under existence of a catalyst shown as a formula A, and cuprous halide and inorganic base, a compound 1 and a compound 2 are subjected to a coupling reaction to obtain the benzamide compound. The method has the advantages of high yield, simple operation, high security, cleaning, and environmental protection, and is suitable for industrial production.