The invention provides a production method and a processing mold of a PVC co-extrusion stone plastic profiled material. The production method comprises the technical steps of (1) adding PVC stone plastic materials into a mixer according to the formula proportion, increasing the temperature to be 110 to 130 DEG C through self friction of the materials, then cooling till the temperature reaches 40 to 50 DEG C through a condenser, and adding the cooled materials into a main hopper; (2) adding PVC materials into the mixer according to the formula proportion, increasing the temperature to be 110 to 130 DEG C through self friction of the materials, then cooling till the temperature reaches 40 to 50 DEG C through the condenser, and adding the cooled materials into an auxiliary hopper; and (3) extruding the PVC stone plastic materials through an extruder, pressing the extruded PVC stone plastic materials into a PVC stone plastic material feed inlet of the processing mold, carrying out compaction, fusion and mixing homogenization, molding a core in the processing mold, at the same time, squeezing the PVC materials into a PVC material feed inlet of the processing mold through the extruder, and coating the outer surface of the molded core, wherein the temperature of a screw of the extruder is 85 to 95 DEG C; and the extrusion pressure is 8 to 16 Mpa. According to a product produced through the production method, the waterproofness, bending resistance, toughness, surface ageing resistance and adhesion firmness degree for hot rolling printing are higher than those of a stone plastic material, the weight is lower than that of the stone plastic material, the hardness is higher than that of PVC, and the construction cost is lower than that of PVC.