Normal sectional anatomy of the calcaneus with multiplanar CT examination was studied in 5 volunteers as the background for interpretation of various abnormalities. Major 3 sectionla anatomy including plantar, coronal , sagittal and additional tuberosity planes are described. With CT examination of the calcaneus. 1. More detailed anatomy of 3 facets of subtalar joint (anterior, middle , and posterior facet) can be well visalized. 2. Its clinical applications in the tarsal trauma, tarsal coalition, subtalar infection, degenerative arthritis, club foot, pes planus and tarsal tumor could provide much more informatons, which not obtained by conventional radiographic studies.