For　the　problem　of　complex　heterogeneous　network　congestion,　an　adaptive　RED　algorithm　based　on　Bell　type　membership　function　is　proposed,　in　the　new　algorithm,　the　probability　function　of　packet　loss　is　nonlinear　by　using　the　Bell　type　Fuzzy　membership　function　.On　one　hand,　it　can　enhance　the　adaptability　of　network　and　avoid　cyber　source　waste,　on　the　other　hand,　it　automatically　adjust　the　probability　of　packet　loss　according　to　the　network　environment　to　keep　the　queue　length.　Simulation　shows　that　the　new　algorithm　can　effectively　control　the　occurrence　of　IoT　and　has　strong　adaptivity.