Preparation method of OGS touch screen

The invention discloses a preparation method of an OGS (One Glass Solution) touch screen, which comprises the following steps: a plurality of bridge body structures are manufactured on a transparent substrate, and each bridge body structure comprises an ITO (Indium Tin Oxide) bridge and an insulating bridge covering the ITO bridge; forming a second ITO conductive layer on the transparent substrate; forming a shielding layer on the second ITO conductive layer; etching the second ITO conductive layer below the hollow area by using an etching solution through the shielding layer so as to form a plurality of ITO electrodes on the transparent substrate and expose residual ITO when the ITO bridge is etched at the same time, and then continuously etching to remove the residual ITO; and stripping the shielding layer. According to the OGS touch screen, the phenomenon that the transverse electrodes and the longitudinal electrodes which are originally separated from each other are lapped together to form a short circuit