The invention belongs to the field of laser marking materials, and specially relates to a continuous nano silver wire/graphene foam and PA co-blended laser marking material and a preparation method thereof. The method comprises the following steps: a precursor containing silver, a stabilizer and a control agent are dispersed into an organic solvent, and ultrasonic treatment is performed fully, thus a precursor dispersion liquid containing the silver is obtained; graphene foam is soaked fully, and microwave treatment is performed, thus nano silver wire/graphene composite foam is obtained; the obtained nano silver wire/graphene composite foam and PA are mixed, and molding is performed; and laser marking is performed.