The invention discloses an oily conductive silver paste and a preparation method therefor. The silver paste comprises the following raw materials by weight: 10-30 parts of silver powder, 5-15 parts of silver nanowires, 20-40 parts of epoxy resin, 20-40 parts of dibasic esters, 10-20 parts of polyurethane, 0.1-2 parts of dispersing agent and 0.1-2 parts of anhydride-type curing agent, wherein the silver powder is formed by the mixing of flake-shaped silver powder and spherical silver powder according to a ratio: 1: 1-5. The conductive silver paste is formed by the complex formulation of silver powder and silver nanowires, reduces the consumption of conductive filling materials, improves the conductive performance of the material, reduces the consumption of silver, and reduced the production cost.