Inclusion Criteria:  （1）ages between 18 and 60 years old. (2) Inpatients diagnosed with unique anterior cruciate ligament rupture and ready for anterior cruciate ligament reconstruction. (3) no combined injuries.  Exclusion Criteria:  (1) The patient is younger than 18 years old or older than 60 years old, (2) multiple ligament injuries of the knee joint are suspected, and (3) combined fractures are suspected.