The invention discloses a method for forming reinforced-phase-strengthened composite welding seam structural material by regulating. The method comprises the following steps: separately cleaning the surfaces of a to-be-welded parent material, a composite material and brazing filler metal to remove an oxide film, stains and grease, and drying the to-be-welded parent material, the composite material and the brazing filler metal for later use; and then, assembling the materials according to a structure of parent material/brazing filler metal/composite material/brazing filler metal/parent material, putting the assembled materials into an ultrasonic auxiliary welding device, applying ultrasonic waves while heating and preserving the heat, starting a pressurizing device to carry out welding in case of reaching a predetermined temperature and ultrasonic fields, stopping ultrasonic action while the temperature is reduced to the room temperature after welding, and taking out a welded part, thereby obtaining the reinforced-phase-strengthened composite welding seam structural material. The method has the advantages and the positive effects that: the method is used for forming reinforced-phase-strengthened composite welding seam structural material by regulating, welding for metal and nonmetal can be carried out, bonding interface reaction is controllable, residual thermal stress is relatively small, and the bonding strength is relatively high.