The invention discloses a method for manufacturing an electromagnetic shielding curved surface optical window with a metal mesh structure, and belongs to the technical field of optical windows. The method comprises the steps: pasting an adhesive tape at an edge of the external surface of a curved surface substrate firstly, and coating the edge with crack lacquer; naturally drying the crack lacquer under the proper conditions secondly, thereby forming a crack template; peeling off the adhesive tape thirdly and then depositing a conductive metal layer on the surface of the crack template; and finally dissolving and eliminating the crack template, thereby obtaining the electromagnetic shielding curved surface optical window. The method not only prevents the increase of the width of a metal line from causing the reduction of light transmittance performance of the optical window, but also prevents a conventional mechanical friction mode from causing the reduction of the light transmittance performance of the optical window and the electromagnetic shielding performance at the same time. The method also can give specific machining conditions for solving a problem that the energy of high-order diffraction is not distributed uniformly, thereby enabling the optical window manufactured through the method to be good in electromagnetic shielding performance and optical performance and to be wider in application range.