The　secure　consensus　problem　of　multiagent　systems　with　input　saturation　and　denial-of-service　(DoS)　attacks　constraints　is　an　interesting　research　problem.　To　solve　this　problem,　the　assumptions　that　all　the　agents　own　the　same　saturation　level　and　suffer　the　same　DoS　attacks　from　a　single　adversary　are　usually　made.　This　brief　removes　the　above　assumptions　and　investigates　the　secure　consensus　problem　of　multiagent　systems　with　different　saturation　levels　and　multiple　DoS　attacks.　The　studied　multiagent　systems　have　different　layers,　in　which　different　saturation　levels　are　studied　for　different　layers.　Moreover,　the　DoS　attacks　are　launched　from　different　adversaries　and　will　cause　different　effects　for　different　agents.　To　achieve　the　desired　objective,　two　different　consensus　protocols　for　agents　in　different　levels　are　first　designed　using　the　low-gain　technique.　Then,　the　investigated　dynamic　system　under　DoS　attacks　is　modeled　by　a　switched　system　by　categorizing　the　DoS　attacks　into　several　types.　The　controller　is　proposed　by　solving　parametric　algebraic　Riccati　equation　(ARE).　Sufficient　conditions　for　the　DoS　attack　duration　on　each　channel　are　derived.