In　this　paper,　an　improved　COVID-19　model　is　given　to　investigate　the　influence　of　treatment　and　media　awareness,　and　a　non-linear　saturated　treatment　function　is　introduced　in　the　model　to　lay　stress　on　the　limited　medical　conditions.　Equilibrium　points　and　their　stability　are　explored.　Basic　reproduction　number　is　calculated,　and　the　global　stability　of　the　equilibrium　point　is　studied　under　the　given　conditions.　An　object　function　is　introduced　to　explore　the　optimal　control　strategy　concerning　treatment　and　media　awareness.　The　existence,　characterization　and　uniqueness　of　optimal　solution　are　studied.　Several　numerical　simulations　are　given　to　verify　the　analysis　results.　Finally,　discussion　on　treatment　and　media　awareness　is　given　for　prevention　and　treatment　of　COVID-19.