Bidding and tendering data management method based on block chain

The invention provides a bidding and tendering data management method based on a block chain, and relates to the technical field of block chains, and the method comprises the following steps: S1, when bidding information is obtained, obtaining bidding demands for representative sampling classification, and obtaining first and second bidding demands; s2, obtaining bidding application data, and performing feature decomposition to obtain bidding application features; s3, judging whether all the bidding application features of the bidding user meet a second bidding demand or not, and if yes, executing S4; otherwise, the operation is not executed; and S4, carrying out association matching on the bidding application feature and the first bid invitation demand, generating an association data string, and sending the association data string to a bid invitation party. According to the method, representative sampling and classification are carried out on the bidding demands through the block chain network, the data used