Building construction quality tracing method based on block chain

The invention discloses a block chain-based building construction quality tracing method. A system is logically divided into a base layer, a core layer and an application layer; the base layer comprises an operation layer, an infrastructure layer and a data layer; the operation layer comprises a park engineering quality chain, engineering design, material supply and debugging and acceptance engineering construction sub-items; the infrastructure layer comprises hardware such as RFID, a material two-dimensional code, a temperature and humidity sensor, video monitoring and the like and BIM model software; the quality management data of the data layer is the summary of data acquired by the operation layer and the infrastructure layer; the core layer comprises a network layer, a consensus layer and a contract layer; the network layer is based on a P2P network, a propagation mechanism and a verification mechanism, and the consensus layer is based on POW, POS and DPOS consensus mechanisms; the contract layer compris