Block chain system implementation method for updating Internet of Things data based on bsdiff

The invention relates to a blockchain system implementation method for updating Internet of Things data based on bsdiff, and belongs to the field of Internet of Things data storage. Comprising the following steps: an Internet of Things sensing node processes and transmits a collected Internet of Things data packet, waits for receiving data packet storage proof from a plurality of bsdiff data storage nodes contained in index information, ensures that the data packet storage proof is correctly stored, and broadcasts the index information to a block chain network; and each block chain node calls an intelligent contract to process the index information and then executes a PoW algorithm, the block chain node which firstly completes the PoW algorithm packages the index information into a candidate block and broadcasts the candidate block in the block chain network, and when a consensus is reached in the range of the block chain network, the candidate block is subjected to uplink processing. The method has the advan