With　the　rapid　development　of　the　Internet　of　Things　(IoT)　and　the　continuous　expansion　of　the　application　market,　the　problem　of　data　sharing　and　security　of　IoT　devices　has　been　fully　emphasized.　To　address　this　problem,　a　multi-authorized　centralized　attribute-based　encryption　scheme　based　on　the　characteristics　of　IoT　data　sharing　is　proposed.　The　scheme　can　realize　fine-grained　access　control　of　ciphertext　data　while　guaranteeing　data　privacy.　The　attribute-based　encryption　scheme　with　multiple　authorization　centers　is　firstly　adopted　to　solve　the　user　collusion　problem.　The　IoT　access　server　is　introduced　in　the　IoT　architecture　to　complete　the　attribute-based　encryption　operation,　and　the　MQTT　server　and　RocketMQ　server　are　built　to　complete　the　integration　of　device　message　processing　and　attribute-based　encryption　algorithm.　Finally,　through　theoretical　analysis　and　experimental　results,　it　is　proved　that　the　scheme　proposed　in　this　paper　has　advantages　in　the　security　of　multi-authorization　attribute-based　encryption　scheme,　and　this　scheme　is　more　suitable　for　IoT　environment.