The invention relates to an active package anti-counterfeiting and tracing on-line structure based on a block chain. The structure actively realizes on-line of product status information in a processof opening a product package, and includes a flexible circuit attached on an assumed opening position of the product package. An upper part of the flexible circuit is provided with an inductive emitting integrated chip based on block chain technology, a power supply and a line liable to be torn. When the product package is opened, the line liable to be torn is broken, the inductive emitting integrated chip is enabled to receive a current change, a preset instruction is triggered, and information is uploaded into the product block chain. A unique code is also arranged on the product package. According to the structure, the block chain is used to store the information in a distributed manner, and security is high; the most important thing is that the structure actively realizes a ''product status report'', and more accurate market information can be obtained for a manufacturer; and the structure can be applied to most packaging occasions, provides solutions for new-generation product anti-counterfeiting and tracing technology, and has a market value and technological advancement.