The　high　temperature　baseline　seal　with　hybrid　structure　of　multiple　materials　is　a　novel　porous　composite,　which　is　composed　of　thermal　insulation　core　material,　metal　braided　spring　tube　and　ceramic　fiber　braided　tube.　It　has　excellent　multi-functional　performances,　including　flexibility,　high　temperature　resistance,　abrasion　resistance　and　sealing.　It　is　vital　for　improving　the　comprehensive　performance　of　the　hot　end　components,　especially　for　the　new　generation　of　high-speed　aircraft.　Hybrid　structure　of　multiple　materials　can　take　advantage　of　specific　attributes　of　each　material　to　enhance　the　performance　of　a　product　or　introduce　new　functionalities.　For　the　proposed　high-temperature　baseline,　the　inner　core　material　plays　a　role　on　thermal　insulation,　and　the　intermediate　superalloy　braided　spring　tube　play　a　dominative　effect　on　the　elastic　deformation　recovery　during　the　dynamic　seal　condition,　and　the　outer　ceramic　fiber　tube　makes　a　function　on　heat　and　wear　resistance.　The　major　problem　of　hybrid　structure　is　emanated　from　the　different　property　of　each　component　material,　the　internal　relationship　between　hybrid　structure　and　performance　regulation　is　still　unclear.　To　end　this,　the　characteristics　of　each　component　material　and　fabrication　technology　of　high　temperature　baseline　seal　with　hybrid　structure　of　multiple　materials　are　firstly　introduced.　Then,　the　current　research　on　the　theory　and　numerical　model　of　high　temperature　baseline　are　sorted　out　and　summarized.　Once　more,　the　main　challenges　for　the　key　fabrication　technology　of　high-temperature　baseline　seal　and　its　service　ability　in　the　high-temperature　and　dynamic　loading　are　expounded.　Finally,　the　research　development　trend　and　engineering　application　potentials　of　novel　high-temperature　baseline　seal　with　hybrid　structure　of　multiple　materials　are　prospected.　©　2024　Beijing　University　of　Aeronautics　and　Astronautics　(BUAA).　All　rights　reserved.