The invention discloses a melting and infiltration combination method for powder metallurgy. The melting and infiltration combination method comprises the steps of raw material mixing, compression moulding, sintering, copper infiltration and the like. The raw materials comprise, by weight part, 90-100 parts of iron powder, 1.0-1.5 parts of graphene, 0.05-0.1 part of lanthanum oxide, 1.0-1.5 partsof vanadium powder, 0.5-1.0 part of cobalt powder, 1.0-1.5 parts of chromium powder, 1.0-1.5 parts of zinc powder, 1.5-2.0 parts of calcium oxide, 2.0-3.0 parts of magnesium powder, 0.1-0.2 part of titanium carbide, 0.05-0.1 part of aluminum nitride and 0.5-0.6 part of a lubricating agent. A copper infiltration agent is prepared from, by weight part, 90-100 parts of copper powder, 2.0-3.0 parts ofiron powder, 0.5-1.0 part of nickel powder, 0.5-1.0 part of manganese powder, 0.5-1.0 part of molybdenum powder, 0.5-1.0 part of aluminum powder, 0.5-1.0 part of tin powder and 0.5-0.6 part of zinc stearate powder. The method is reasonable in raw material formula, simple in process and high in production efficiency, and produced and prepared parts have the beneficial effects of being excellent instrength, hardness, wear resisting performance and impact resisting performance.