The invention discloses a block chain technology certification method based on biological characteristics. The method comprises the following steps of obtaining traceability information and collecting biological characteristic information of a person in charge, wherein the main source of the traceability information is from various stages of product production, utilizing an automatic or semiautomatic way to obtain different environmental data in a product production process, and adding and publishing the environmental data into a block chain after affirmation; and collecting the biological characteristics of person in charge at the various stages, adopting a biological characteristic recognition sensor to collect, adopting a digital signature way to encrypt the biological characteristics, constructing a traceability coding tag for the obtained information, bringing the information into the block chain, obtaining a hash value through the information at various stages and bringing the hash value into the block chain. According to the method, the biological characteristic recognition mechanism and the block chain technology are more deeply combined, the more detailed product information can be provided, the basis is provided for more efficient production flow management, and the effective, credible and detailed traceability information can be obtained.