The invention relates to the field of automatic welding, in particular to a visual identity closed-loop control method for solder paste precision welding. According to the method, on the basis that the vertical projection area of a bonding pad and solder paste is detected through machine vision, precision control over the solder paste coverage area in the whole solder paste laser welding process is achieved by controlling the amplitude and time of excitation current of a laser module, the splash-free and residue-free welding effect is achieved, the problems of solder free or insufficiency and lack of penetration of a welding point are solved respectively, and the good welding quality is ensured.