A　triazole-stabilized　fluorescence　sensor　is　developed　for　copper　detection　in　the　study.　Tris-(benzyltriazolylmethyl)amine　(TBTA)　is　used　to　improve　the　sensitivity　and　stability　for　the　sensing　system.　A　series　of　comparative　experiments　are　performed　with　and　without　TBTA.　In　the　presence　of　TBTA,　the　fluorescence　decrease　ratio　is　enhanced　from　2.46　to　118.25;　the　detection　limit　is　reduced　from　67　nM　to　3.6　nM;　the　higher　selectivity　toward　copper　compared　to　the　other　metal　ions　is　verified,　including　K+,　Ca2+,　Cd2+,　Zn2+,　Mg2+,　Mn2+,　Pb2+,　Hg2+,　Fe3+　and　Cr3+.　Besides,　the　sensing　system　is　successfully　applied　for　copper　determination　in　complex　tea　samples　and　chicken　feed　samples　with　the　recovery　range　of　91.67–116.8%.　A　good　consistency　between　the　presented　sensor　and　the　flame　atom　absorbance　spectrometry　(FAAS)　is　confirmed　by　the　low　relative　errors　with　the　range　from　−2.39%　to　7.02%.　©　2020　Elsevier　Ltd