Cold spray was used to prepare the AgSnO₂ coating on copper substrates with high energy ball milled Ag-SnO₂ composite powders. The increased density, migration of Ag-rich phase toward the boundaries of original composite powders and decreased hardness occurred for the cold sprayed coatings during annealing at 850 ℃. It was found by the arcing and electrical contact experiments that there is low and stable contact resistance for the AgSnO₂ coating, which can be used in the low voltage apparatus.