Projection micro stereolithography (PμSL) is a high-resolution (up to 0.6 μm) 3D printing technology based on area projection triggered photopolymerization, and capable of fabricating complex 3D architectures covering multiple scales and with multiple materials. This paper reviews the recent development of the PμSL based 3D printing technologies, together with the related applications. It introduces the working principle, the commercialized products, and the recent multiscale, multimaterial printing capability of PμSL as well as some functional photopolymers that are suitable to PμSL. This review paper also summarizes a few typical applications of PμSL including mechanical metamaterials, optical components, 4D printing, bioinspired materials and biomedical applications, and offers perspectives on the directions of the further development of PμSL based 3D printing technology.

投影微立体光刻（P μ SL）是高的分辨率（高达0.6 μ M）基于区域投影光聚合引发3D印刷技术，和能够制造复杂的三维结构覆盖多尺度，并用多种材料。本文综述了近年来的P的发展μ基于3D SL打印技术，与相关应用程序结合在一起。它介绍了工作原理，该商业化产品，和最近的多尺度，多材料印刷P的能力μ SL以及适于为P一些功能性的光聚合物μ SL。该评论文章还总结P的几个典型的应用μSL包括机械超材料，光学元件，4D印刷，仿生材料和生物医学应用，并提供观点上P的进一步发展方向μ基于3D SL印刷技术。