The utility model relates to an outer holding strip mounting structure between a car door outer skin and a windscreen, which comprises an outer holding strip, a windscreen and an outer skin, wherein the outer holding strip is provided with an n-type clamping part which is clamped on the outer skin, and one end of the outer holding strip is provided with a lip part which is pressed on the windscreen; and the lip part and the windshield produce the magnitude of interference, and one side of the lower end of the n-type clamping part is provided with a barb which hooks the edge of the outer skin. The lip part is in interference fit with glass, and the barb arranged at the clamping part is matched with the outer skin, so that the outer holding strip forms force abutting against the glass, accordingly, the outer holding strip is firmly fixed on the outer skin and jointed with the glass, the sealing effect between the windscreen and a glass surface is very good, and the installation is firm; and a flocking processing surface arranged on the lip part can effectively reduce the resistance of the glass during lifting and beautify the appearance.