3D-Chain is an integration and innovation based on blockchain technology and thinking in the 3D printing industry. Its main application scenarios are 3D data transactions, 3D printing services and commodity C2C transactions to realize rights confirmation and records. 3D-Chain builds a mutual trust platform that integrates upstream and downstream resources of 3D printing through smart contracts and NFC chip technology. Healthy development, and will create great social value and economic value. By using the titanium chain blockchain side chain technology, write smart contracts on the titanium chain blockchain, and through distributed accounting, the 3D printing source files can be confirmed and protected without centralization, which can guarantee the designer or The commercial value guarantee of the design team will accommodate a large amount of industry design data for global demanders to retrieve the required data for printing services, and effectively promote the improvement of industry design and R&D capabilities.