This　article　studies　output　tracking　control　for　switched　systems　with　an　adaptive　stay　interval　based　event-triggering　scheme.　By　considering　limited　communication　and　computation　resources,　an　event-triggering　scheme　based　on　stay　interval　is　adopted.　To　further　improve　the　adjustment　capability　of　network　communication,　an　adaptive　stay　interval　which　can　be　changed　depend　on　system　performance　is　presented.　A　class　of　tracking　controllers　with　error　integral　terms　are　applied　to　make　switched　systems　have　more　accurate　tracking　performance.　Then,　closed-loop　switched　systems　that　composed　by　system　state　and　tracking　error　are　modeled,　and　a　set　of　sufficient　conditions　for　ensuring　systems　achieve　the　desired　output　tracking　performance　is　given.　By　using　linear　matrix　inequalities,　the　controller　gains　and　event-triggering　parameters　are　obtained.　In　particular,　since　variable　stay　interval,　triggering　instants,　and　switching　instants　are　mutually　inclusive,　various　cases　are　fully　analyzed　to　guarantee　the　integrity　of　system　performance　discussion.　Finally,　simulation　examples　are　shown　to　demonstrate　the　feasibility.