Reactive diluents, as an important component of photosensitive resins, have significant impacts on the properties of photosensitive resins. Using epoxy acrylate as a prepolymer, five commonly used reactive (double bond) diluents with different functionalities, including isobornyl acrylate, the effects of reactive diluents on photosensitive resins were investigated in terms of viscosity, curing shrinkage, heat resistance, and mechanical properties．The results show that within the scope of the study, as the functionality of the reactive diluent increased, the material’s heat resistance and mechanical properties improved, while viscosity and curing shrinkage also increased. There was a rigid structure in the active diluent acryloyl morpholine (ACMO), which increased the glass transition temperature of the material by 23.91 ℃. ACMO contained structures that could form hydrogen bonds, resulting in a tensile strength of 48.56 MPa and an impact strength of 31.33 kJ/m2 for the material. Within the scope of research, ACMO had the best comprehensive performance.