Terminal upgrading protection system and method based on block chain

The invention provides a terminal upgrading protection system and method based on a block chain. The system comprises an Internet-of-Things rear end and a plurality of terminals, wherein block chain nodes are respectively deployed on the Internet-of-Things rear end and the terminal; the Internet-of-Things rear end is used for grouping the block chain nodes deployed on the terminal into a pluralityof terminal groups through a decision tree induction algorithm; the rear end of the Internet-of-Things and the plurality of terminal groups construct a block chain network; and upgrading data is packaged, a transaction application is initiated to other block chain nodes in the block chain network, and the upgrading data is in consensus to the block chain network, and the terminal is used for completing upgrading processing by utilizing upgrading data obtained by the deployed block chain node through the consensus of the block chain network. 本发明提供了一种基于区块链的终端升级保护系统及方法，所述系统包含：物联网后端和多个终端；所述物联网后端和所述终端上分别部署区块链节点；所述物联网后端用于通