The invention discloses a method for molding micro-profiled composite joint strips. The method is characterized by comprising the following steps: performing wire drawing or roller drawing on square composite wires for pre-forming the needed double-peak appearance wires; and performing final forming on the pre-formed composite wires through a precision-rolling mill with a welding rib limited concave-convex molding roller, thereby obtaining the needed product with a special profile shape. The stress point of the composite strip in the rolling process is changed in a manner of pre-forming the double-peak appearance, so that the interface of the micro-profiled composite wire can be straightened, the precious metal cladding phenomenon is reduced, the utilization rate of precious metals is greatly improved, and the needed micro-profiled composite product is easily formed; and moreover, rolling forming is performed by utilizing the welding rib limited roller, the welding rib position does not need to be adjusted in the production process, the process wastes can be reduced, the production efficiency is improved, and the production cost of the whole product is reduced.