In　the　context　of　green　supply　chain,　the　opening　of　manufacturer＇s　direct　sales　channel　will　have　a　significant　impact　on　the　retailer＇s　profit,　as　well　as　on　the　retailer＇s　order　quantity,　product　price　and　green　efforts.　Therefore,　when　opening　the　dual　channel,　the　manufacturer　must　consider　its　own　optimal　profit　and　the　retailer＇s　optimal　profit,　so　that　both　sides　of　the　supply　chain　can　achieve　a　win-win　situation.　In　this　paper,　a　manufacturer-led　Stackelberg　model　based　on　green　efforts　is　constructed　to　study　the　optimal　operation　strategies　of　risk-sharing　single-channel　and　dual-channel　manufacturer.　Through　the　comparative　study　and　analysis　of　numerical　examples,　it　is　found　that　if　the　manufacturer　chooses　dual-channel　mode,　manufacturer　can　achieve　better　results　through　its　own　green　efforts　than　single-channel　structure.　However,　in　certain　cases,　it　can　be　seen　that　the　manufacturer　is　not　profitable,　so　the　manufacturer　may　choose　the　single-channel　model.