Objective To investigate the appearances and the clinical value of multislice CT (MSCT) in orbital trochlea calcification. Methods In this research, 216 patients with orbital MSCT examination due to trauma or suspected orbital foreign body were collected, in which 54 cases were detected with orbital trochlea calcification. The MSCT findings of 54 cases of orbital trochlea calcification were analysed. Results The 54 cases of orbital trochlea calcification accounted for 25％of all patients (54/216) and the average age of them was 37.6 years.Orbital trochlea calcification was located in fixed position, attached to the top of the front medial orbital wall, continuous with the superior oblique tendon. bilateral calcification was showed in 30 cases. Major shape of the calcification was small spots or short strip. Size and shape of orbital trochlea calcification might be inconsistent with bilateral. The average CT value of calcification was 165HU. Conclusion MSCT can show the features of the orbital trochlea calcification and has an important clinical significance.