The invention discloses a porous foam enhanced metal composite material and a preparation method thereof and belongs to the technical field of composite materials. The preparation method comprises thefollowing steps: first, carrying out chemical silvering and preparing a reducer solution; preparing a carbon-containing nanotube electroplating solution taking copper sulfate pentahydrate as main salt; carrying out chemical silvering and electrocoppering (a carbon-containing nanotube) on melamine foam; then carrying out thermal treatment to obtain foam metal carbon-serial copper; filling copper power; tabletting the mixture by a tabletting machine to prepare flakes; and sintering the flakes by an SPS sintering furnace to obtain a final composite material. By taking copper-carbon-serial foam as a framework, the composite material is prepared by means of a copper power filling method. The carbon nanotube is free of large area agglomeration inside, so that the mechanical property of the finally obtained composite material is improved greatly. The composite material has a wider application field. The porous foam enhanced metal composite material is simple in integral process, and used devices are concise and convenient to operate, so that mass production can be achieved.