Stereolithography (SLA) is a promising additive manufacturing technology in terms of versatility and functionality. However, SLA-printed products lack mechanical properties and accuracy, so post-processing is essential. This study comprehensively contributes to a deeper understanding of influences of two types of post-processing [ultraviolet (UV) treatment and machining] and interactions between them. The effect of UV treatment was first investigated by evaluating properties of SLA specimens before and after UV curing. The UV curing greatly increased hardness by rearranging the molecular chains. The higher curing temperature, the denser and more uniform network was created; the surface hardness of the specimen cured at 80 °C increased by 208.30 % compared to the uncured specimen. Then, the interactions were analyzed by machining SLA specimens cured under different conditions. The pre-curing increased the hardness, molecular bonding, and brittleness. Thus, small surface roughness on the machined surface and small exit edge chipping were observed under the non-pre-curing conditions; the pre-curing increased the exit edge chipping size up to 48.21 %.