Conductive paste, in Our country has a long history of use, but also has the most controversy. Whether the conductive paste can reduce the contact resistance of the switch and extend the service life of the switch is discussed in this paper. By definition, the commonly used conductive paste on the market, its basic performance is the same, is based on mineral oil, synthetic liposuction oil, silicone oil as the base oil, added conductive, anti-oxygen, anti-corrosion, arc suppression and other special additives, by grinding, dispersion, modified refined soft paste, play a significant effect of anti-corrosion, energy-saving effect.