Abstract: Aiming at the problem that it is difficult to use DLP technology in production 3D printing equipment due to its small format, a design scheme of DLP 3D printer for continuous production of multiple light sources is proposed. The multiple DLP optical engines are used to expand the forming format, a plate with multiple grooves and a comb blade are designed, thus the formed parts are automatically removed from the plate and placed in the receiving tank, and then cooperating with the centralized liquid supply system to realize the automatic replenishment of the resin in the printer.With the help of computer network technology, the printer will notify the cloud server after each printing, and the server will automatically send the next production task to the printer; thus it solves the problem of DLP 3D printer being too small and unable in continuous production, which has positive significance for upgrading of the 3D printing technology from prototype manufacturing to small batch production.