During　the　fabrication　of　thin-walled　superalloy　structures,　materials　often　undergo　complex　loading　paths　and　exhibit　different　mechanical　properties　compared　to　those　under　simple　loading　paths.　For　example,　when　subjected　to　cyclic　loading,　superalloy　ultrathin　sheet　exhibits　pronounced　Bauschinger　effect.　Furthermore,　the　achievement　of　precise　forming　in　thin-walled　superalloy　components　is　hindered　by　size　effect.　To　enhance　the　forming　accuracy　of　superalloy　components,　this　study　systematically　investigated　the　interplay　between　pre-　strain,　size　effect,　and　Bauschinger　effect,　along　with　their　underlying　mechanisms.　Cyclic　deformation　mechanical　response　of　GH4169　ultrathin　sheets　with　different　thicknesses　and　grain　sizes　were　thoroughly　examined　under　diverse　pre-strain　conditions　through　cyclic　shearing　test.　The　evolution　laws　of　Bauschinger　parameters,　specifically　as　they　relate　to　varying　pre-strains,　thicknesses　and　grain　sizes,　were　further　determined.　To　rationalize　these　Bauschinger　parameter　evolution　laws,　electron　backscatter　diffraction　(EBSD)　and　transmission　electron　microscopy　(TEM)　were　used　to　characterize　the　microstructure　of　GH4169　ultrathin　sheets.　Results　indicated　that　the　primary　mechanism　driving　Bauschinger　effect　in　GH4169　ultrathin　sheets　is　the　arising　of　back　stress　from　dislocation　slip　and　accumulation.　As　the　level　of　pre-strain　intensifies,　Bauschinger　effect　becomes　more　pronounced,　which　is　attributed　to　the　intricate　interplay　between　the　evolving　densities　of　moving　and　forest　dislocations.　Moreover,　as　grain　size　decreases,　Bauschinger　effect　undergoes　an　enhancement　due　to　changes　in　moving　dislocation　density　and　grain　boundary　strengthening　effect.　Conversely,　size　effect　inherent　to　GH4169　ultrathin　sheets　exerts　a　dampening　influence　on　Bauschinger　effect.　This　weakening　is　intimately　tied　to　surface　layer　effect,　which　modulates　the　dislocation　density　within　GH4169　ultrathin　sheets.　These　intricate　interactions　underscore　the　complexity　of　Bauschinger　effect　in　thin-walled　superalloy　structures　and　highlight　the　need　for　nuanced　approaches　in　material　design　and　processing.