3D printing, known as the “new industrial revolution,” has set off an upsurge in the scientific and technological field in recent years, and 3D printing of digital light processing technology has even improved the performance and efficiency of 3D printing. This technology uses the projection principle to form; no matter the size of the workpiece, the forming speed is not affected. It uses very cheap lamp radiation, the system has no injection‐molded components, there is no nozzle clogging problem of traditional molding systems, and maintenance costs are greatly reduced. In this paper, based on digital light processing 3D printing technology, light‐curing reactive functional materials commonly used in digital light processing 3D printing are prepared. In the past, most of these materials were imported. In this paper, by adjusting the DLP technology, a water‐soluble photocurable reflection material is constructed, a method for shaping the reaction material. It conducts experiments on the preparation and performance research of water‐soluble photocurable reaction materials through formulation and process optimization. It prepared a water‐soluble photocurable reactive functional material and compared it with traditional imported materials. Due to the characteristics of UV curing and good mechanical properties and water solubility, it provides a new idea for the preparation of 3D printing‐related functional materials.