Fluorescent　hydrogels　are　soft　materials　that　can　emit　light　under　certain　conditions,　which　makes　them　attractive　for　biomedical　and　engineering　applications.　Nevertheless,　one　of　the　major　challenges　in　developing　fluorescent　hydrogels　is　their　low　mechanical　properties.　To　overcome　this　challenge,　we　have　developed　an　efficient　method　for　preparing　high-strength　and　fluorescence　hydrogels　via　freeze-thaw　cycles.　This　approach　offers　a　promising　solution　to　enhance　the　mechanical　properties　of　fluorescent　hydrogels,　which　could　broaden　their　applications　in　various　fields.　We　used　polyvinyl　alcohol　(PVA)　as　the　main　component　and　added　2,4,6-tri(4-aminophenyl)　triazine　(TAPT)　as　a　rigid　fluorescent　substance.　We　find　that　these　hydrogels　have　higher　strength　than　conventional　PVA　hydrogels.　These　hydrogels　exhibit　strong　fluorescence.　Hydrogen　bonds　and　p-p　stacking　between　-NH2　and　PVA　construct　the　network　structure.　The　composite　hydrogel　has　significant　mechanical　properties,　with　a　maximum　tensile　strength　of　44.7　MPa,　maximum　elongation　at　break　of　310.1%　and　Young＇s　modulus　of　138.5　MPa.　Compared　with　the　PVA　hydrogel,　the　tensile　strength　and　elongation　at　break　of　the　hydrogel　with　the　addition　of　2%　TAPT　are　increased　by　292.6%　and　153.0%,　respectively.　TAPT　molecules　are　bound　to　the　inside　of　the　gel　network,　which　makes　the　composite　hydrogels　have　strong　fluorescence.　These　hydrogels　with　high　strength　and　fluorescence　have　a　wide　range　of　applications　in　flexible　electronics　and　information　displays.