Posterior cruciate ligament is crucial to the stability of knee joint. PCL, located in the central part of knee joint, plays a critical role as the axis of rotation and extension-flexion motion of knee joint. Compared with anterior cruciate ligament, it is deeper located, less susceptible to injury and less symptomatic when injured, therefore related research on PCL has long been neglected. Since 1990s, as studies on PCL especially on its anatomic and biomechanical properties has deeply progressed, these properties of PCL have become more and more important as the guidance of clinical practice of PCL reconstruction. Based on this, the latest progresses in researches on anatomic and biomechanical properties of PCL were reviewed in this article.