A　simple　and　selective　colorimetric　method　for　H2O2　detection　in　soaked　food　samples　was　developed　using　Au@Ag　nanorods　(Au@Ag　NRs)　as　the　signal　conducter.　In　the　presence　of　H2O2,　silver　atoms　on　the　surface　of　Au@Ag　NRs　are　oxidized　to　silver　ions,　thereby　resulting　in　the　red-shift　of　the　longitudinal　surface　plasmon　resonance　peak　of　Au@Ag　NRs　accompanied　by　a　sharp-contrast　multicolor　change.　The　linear　range　for　the　detection　of　H2O2　was　from　0　to　100　mmol　L-1　with　a　limit　of　detection　of　3.2　mmol　L-1.　Compared　with　the　commercialized　test　strip,　the　proposed　colorimetric　sensor　showed　a　much　higher　color　resolution　by　the　naked　eyes.