The invention discloses a solar energy medium/high temperature selective absorption coating with high stability under atmospheric conditions, which is coated on a solar thermal collection element, consists of an infrared reflection layer, an absorption layer and a medium antireflection layer arranged upwards from a substrate, and is characterized in that the infrared reflection layer is an aluminum ternary alloy layer; the absorption layer adopts an alloying metal medium matrix composite structure formed by aluminum ternary alloy nano particles and a medium matrix; and the absorption layer is a high absorption layer and a lower absorption layer sequentially and upwards arranged from the infrared reflection layer. The coating has higher thermal stability, and is very suitable for solar medium/high temperature utilization.