Abstract: This article reported an investigation on the accuracy and tensile property derived from the prototyping process and postprocessing technology for improvement of the accuracy and mechanical properties of SLA parts. VisiJet SL Black photosensitive resin was employed as a based material to prepare SLA parts.Effects of layer thickness and support angle on the size and surface accuracies of the parts were studied, and influence of postcuring time on their mechanical properties was evaluated.The results indicated that the parts achieved a higher size accuracy when the support angle was close to 45 °.A hump phenomenon was observed for the parts with a thick layer at a small support angle.Thicker layer resulted in a rougher surface for the parts The parts achieved a tensile strength around 9.33~22.84 MPa with a brittle fracture.When the postcuring time was set to 200 min, the parts obtained a best plasticity effect and thus gained the tensile strength of 20.24 MPa and elongation at break of 3.80 % as an optimum value However, the plasticity became poor for the parts at the postcuring time of 250 mins, although they achieved a maximum tensile strength of 22.84 MPa.