To　explore　the　influences　of　demand　disruption　and　corporate　social　responsibility　on　green　supply　chain　decisions,　the　equilibrium　solutions　under　the　manufacturer-led　green　supply　chain　model　was　examined,　and　the　coordination　issue　in　the　green　supply　chain　was　investigated.　The　model　was　expanded　to　the　supply　chain　competition　situation.　The　results　showed　that　the　manufacturer　needed　to　adjust　the　＇greenness＇　of　the　product　following　the　large　demand　disruption,　and　the　retailer＇s　CSR　behavior　would　increase　the　amount　of　adjustment　of　the　＇greenness＇　of　the　product　by　the　manufacturer　at　this　time.　Demand　disruption　would　deviate　the　actual　profit　of　green　supply　chain　system　away　from　the　expected　value,　in　which　case,　the　retailer＇s　CSR　behavior　would　enhance　the　influence　of　demand　disruption　on　the　profits　of　the　green　supply　chain　system.　Moreover,　a　two-part　tariff　and　cost　sharing　contract　was　proposed　to　coordinate　the　supply　chain.　Supply　chain　competition　would　enhance　the　influence　of　retailer＇s　CSR　behaviors　on　the　extent　of　optimal　＇greenness＇　adjustment　to　the　products,　as　well　as　the　profit　deviation　levels　of　the　green　supply　chain　system.　©　2023　CIMS.　All　rights　reserved.