Uncertainty　and　disturbance　are　always　the　first　issues　to　deal　with　in　any　networked　system.　Considering　these　factors,　the　active　disturbance　rejection　control　(ADRC)　for　networked　switched　systems　(NSSs)　with　decentralized　event-triggered　communication　was　investigated　in　this　study.　This　is　the　first　time　a　comprehensive　analysis　and　synthesis　method　for　the　ADRC　of　NSSs　has　been　proposed.　The　technical　contribution　is　mainly　divided　into　two　categories.　On　the　one　hand,　a　novel　parameter-dependent　switching　constraint　is　proposed,　which　solves　the　problem　of　ADRC-based　switching　law　construction　and　settles　the　complex　coupling　between　switching,　event-triggering,　and　ADRC　components.　On　the　other　hand,　triggering　the　output　of　linear　extended　state　observer　(LESO)　rather　than　its　input　can　result　in　a　more　accurate　estimation,　while　reasonably　configuring　network　resources.　Accordingly,　a　new　tight　bound　of　the　high　gain　adjustment　parameter　of　the　observer　was　obtained.　In　addition,　the　stability　analysis　and　state　convergence　region　calculations　for　switched　ADRC　systems　are　given.　Finally,　the　effectiveness　of　the　proposal　is　demonstrated　by　simulation.