The microstructure and properties of Ag–SnO 2 materials with high SnO 2 content were investigated. The microstructure, physical properties and arc erosion behavior of Ag–SnO 2 materials with high SnO 2 content were studied. The results showed that the Ag–SnO 2 materials with high SnO 2 content show homogeneous microstructure with high hardness and good conductivity. With the SnO 2 content increase from 15wt.% to 30wt.%, it was found that the arc erosion rate decreased 2 times and microhardness increased 51%, which indicates that the arc erosion resistance of Ag–SnO 2 materials can be improved significantly.