The　poor　conductivity　of　sulfur,　non-uniform　Li2S　deposition,　polysulfide　shuttle　effect,　and　slow　reaction　kinetics　severely　hinder　the　commercialization　of　flexible　lithium-sulfur　batteries.　Herein,　a　unique　flexible　selfsupporting　sulfur　host　featuring　a　dual-carbon　layer　hierarchical　structure　is　developed,　which　possesses　the　following　roles:　1)　the　inner　three-dimensional　carbon　nanotube　conductive　network　promotes　electron　and　ion　transport,　alleviates　sulfur　volume　expansion,　and　physically　confines　active　materials;　2)　the　outer　carbon　layer　modified　with　CoSe2　nanoparticles　functions　as　a　chemical　adsorption　carrier　and　electrocatalyst,　effectively　anchoring　polysulfide　and　enhancing　their　conversion　kinetics.　The　innovative　design　of　the　dual-carbon　layer　hierarchical　structure　and　the　＂confinement-adsorption-catalysis＂　synergistic　effect　enable　uniform　Li2S　deposition　and　significant　enhancement　of　sulfur　cathode　electrochemical　performance.　Consequently,　DC/CoSe2-S　exhibited　a　low　capacity　decay　rate　of　0.07%　per　cycle　over　400　cycles　at　1C,　with　an　average　Coulombic　efficiency　of　99.3%.　Notably,　DC/CoSe2-S　maintained　a　capacity　retention　of　98.4%　at　0.1C　for　100　cycles　with　a　high　sulfur　loading　of　4.0　mg　cm-　2　(Electrolyte/Sulfur　=　10　mu　L　mg-　1).　Furthermore,　the　constructed　pouch　cells　(Sulfur　loading　=　4.0　mg　cm-　2,　Electrolyte/Sulfur　=　8.6　mu　L　mg-1)　also　operated　stably　for　50　cycles,　demonstrating　the　promising　potential　for　practical　applications.　This　work　provides　new　insights　into　the　design　of　high-performance　flexible　lithium-sulfur　batteries.