The invention relates to a making method of a high-strength wear resistant nanometer polyvinyl chloride composite film. The method comprises the following steps: drying a polyvinyl chloride material in a vacuum oven, adding a calcium carbonate filler, and uniformly stirring the polyvinyl chloride material and the filler; and adding a heat stabilizer and a plasticizer, uniformly stirring all above substances, adding surfactant modified nanometer alumina whiskers after heat insulation ends, uniformly stirring the above obtained mixture and the whiskers, adding the finally obtained material into a double screw extruder, carrying out extrusion granulation, adding obtained granules into a forming machine, and carrying out traction and cutting to finally obtain the composite film. The nanometer alumina whisker/polyvinyl chloride composite film made in the invention can be widely applied to various sizes of inflatable toys, trampolines, water pools, tents and other leisure and entertainment devices to meet people's relentless pursuit of the quality of life.