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The application provides a mask manufacturing method and a mask manufactured by the method. The mask manufacturing method comprises the following steps: screen printing a stainless steel sheet as a mask; synchronously cutting the stainless steel sheet by using upper and lower laser heads to form a required mask via hole pattern; welding the cut stainless steel sheet to a mask plate frame, removing the excess part and cleaning to obtain a final mask plate. The mask manufacturing method provided by the application can improve the manufacturing yield and efficiency of the mask plate by using the double laser head cutting method without burr and other defects. The mask provided by the application is manufactured by the above method, and the generation of the mask plate via hole edge defects is avoided, so that the quality of the mask plate and the quality of OLED evaporation can be improved.