Objective: Ankle fracture-dislocation of the Lauge-Hansen classification supination - external rotation-type Ⅲ, Ⅳ degree of restoration practices conservative treatment and open reduction and internal fixation of the excellent and good rate of treatment differences, explore the fracture type of a reliable method of Methods: September 2007-December 2008 to the ankle fracture and dislocation classification Lauge-Hansen supination - external rotation-type Ⅲ, Ⅳ degree of patients as research subjects, in line with the inclusion and exclusion criteria, using random number table to divided into two groups, each of the 30 cases, one group means restoration plaster fixation treatment (conservative treatment group), another group using open reduction and internal fixation treatment (surgical treatment group) Mazur, such as the use of the ankle developed symptoms and functional evaluation standards, two sets of data compared to assess the Results: Fracture of the conservative treatment group according to Lauge-Hansen classification standards, supination - external rotation-type 14 cases of grade Ⅲ, Ⅳ degrees 16 cases, Mazur score good rate of 67% Operative fracture treatment group by Lauge-Hansen classification standards, supination - external rotation-type 18 cases of grade Ⅲ, Ⅳ degrees 12 cases, Mazur score 33% P <05, both compared no difference in clinical Conclusion: Manipulative reduction, plaster fixation conservative treatment of ankle fracture and dislocation classification Lauge-Hansen supination - external rotation-type Ⅲ, Ⅳ degree of clinical efficacy with no significant differences in surgical treatment, two treatment options for ankle fractures efficacy and functional recovery have no significant effect can reach a very good therapeutic However, conservative treatment of high factor of safety, economy low-cost, more patients and society to reduce medical costs, create more economic benefits for society Key words: ankle fracture and dislocation Lauge-Hansen classification Supination - external rotation-type Way restoration / conservative fixation / surgery