Objective To study the diagnostic accuracy of MSCT3D technique for type Lauge-Hansen fractures of ankle joint and its scope of application. Methods From January 2017 to December 2017 in our hospital 300 cases of ankle joint fracture patients, CT diagnosis of all patients were divided by Lauge-Hansen, and the results were compared with the intraoperative findings, the accuracy and applicability of Lauge-Hansen type carries on the analysis. The CT diagnostic typing typing and operation control, to determine the accuracy of CT3S technique. Results MSCT3D technology for high accuracy classification of ankle fractures, there was significant difference between the two groups (χ2 =14.063, P<0.01). Lauge-Hansen type rate is about 96.37%, the accuracy of clinical surgery Lauge-Hansen typing for patients with confirmed the type for 96.89%. Lauge-Hansen type defects: in direct violence, vertical violence and high trauma caused by ankle fracture Lauge-Hansen Type has its limitations. Conclusion CT3D and LaugeHansen type with high diagnostic accuracy for ankle fracture, and CT3D technology for the form and occult fracture found obvious advantages. Combining Lauge-Hansen and CT3D technology for the treatment of ankle joint injury to provide accurate reference.