3D printing extrusion nozzle based on industrial design field

The invention provides a 3D printing extrusion nozzle based on the industrial design field, relates to the field of printing extrusion nozzles, and aims to solve the problems that when an existing 3D printing extrusion nozzle is used, after printing is completed, residual materials are likely to appear at an outlet position, and if cleaning is not conducted in time, blockage is likely to be caused. The 3D printing extrusion nozzle comprises a body. The body is a 3D printing extrusion nozzle body, the interior of the body is of a cylindrical structure, and a sealing piece is installed at the top end of the body. When materials pass through, a moving head is pushed to move downwards, the bottom of the moving head is of a conical structure and can be inserted into a conical groove of a partition plate, the partition plate is pushed to move towards the two sides, the bottom of a bottom head can be automatically opened, the moving head can be located on the outer side of the bottom of the bottom head to spray out