Block chain system and tracing method for tracing pipe information of water engineering

The invention relates to a block chain system and a tracing method for water engineering pipe information tracing, wherein the block chain system comprises a production unit node and a construction unit node, wherein the production unit node is used for acquiring first pipe information in a production stage, uploading the first pipe information to the block chain system, and writing the first pipeinformation into an RFID chip mounted on a water engineering pipe through first RFID read-write equipment; the construction unit node is used for scanning the RFID chip through second RFID read-writeequipment in the installation stage to read the first pipe information and obtain second pipe information obtained in the pipe installation site; if the first pipe information is the same as the second pipe information, obtaining signing information, and uploading the signing information to a block chain system; and the construction unit node is also used for uploading the corresponding installation information to the blo