With　the　continuous　deepening　of　social　informatization,　the　Internet　of　Things　(IoT)　devices　are　used　in　large　quantities.　Traditional　centralized　access　control　cannot　meet　the　network　access　control　requirements　of　large-scale　IoT　environments.　Access　control　is　one　of　the　importation　technology　of　information　security.　This　paper　establishes　the　dynamic　game　access　control　model　which　encourages　interactive　entities　to　rationally　choose　strategies　expected　by　the　system　driven　by　its　own　benefits　through　the　designed　mechanism.　Taking　benefits　as　the　driven　force,　the　mechanism　rewards　the　honest　nodes　and　punishes　and　restrains　the　non-honest　nodes,　and　then　reaches　the　general　state　of　equalization　between　entities　which　meets　the　goal.　Finally,　experiments　prove　that　this　method　is　effective　in　the　open　Internet　of　Things,　which　can　greatly　enhance　the　security　of　data　access　between　IoT　sensors,　and　can　effectively　protect　the　privacy　of　network　entity　data.