Task distribution negotiation method for new energy automobile welding production line

The invention discloses a task distribution negotiation method for a new energy automobile welding production line. The task distribution negotiation method comprises the following steps: establishing a corresponding key negotiation channel according to identity attributes of production line task participants; constructing group encryption public keys and decryption private keys of different attribute groups by using the key negotiation channel; packaging task information formulated by a first production line task participant according to the corresponding confidentiality degree, and issuing the task information as a task transaction on a task issuing chain; if the second production line task participant meets the task requirement, opening a decryption authority corresponding to the task information detail data to the second production line task participant; establishing a private data set between the first production line task participants and the second production line task participants; wherein in the task