Special silver electrode paste for touch screen and preparation method thereof

The invention discloses a special silver electrode paste for a touch screen and a preparation method thereof. The silver electrode paste is prepared from the following raw materials by weight percent: 40-80% of silver powder, 2-12% of copper powder, 10-50% of organic carrier and 5-12% of additive. The silver electrode paste of the invention does not contain harmful substances such as lead, the production and processing processes of the paste do not have harmfulness and are beneficial for environmental protection; and the additive is added in the electrode paste of the invention so as to increase the adhesion of the paste to the substrate of the touch screen and solve the factors of dropping and cracking of the electrode in the production process of the touch screen, wherein the factors influence the production of the touch screen and are caused by the problems of the electrode paste. In addition, the sintering temperature of the electrode paste of the invention is lower so as to reduce production cost, save energy and conform to the major trend of the social development.