Objective We observed the best therapy time through the treatment of ankle injury in different period to direct undergraduate treat in time and nicety. Method By reviewing and analyzing 204 patients with ankle injury in south-western university of finance and economics. Results The recovery time is 13 days if you treat instanter and rightly after injury. The recovery time is 16.5 days if you treat in 48 hours after injury. The recovery time is 37.5 days if you treat over 48 hours after injury or treat by wrong way. Conclusion You should treat instanter and rightly after ankle injury.