Objective: To investigate the effect of diffuse extracorporeal shock wave therapy (ESWT) on knee function and stability in male patients after anterior cruciate ligament reconstruction (ACLR). Methods: Forty-eight male patients who were admitted to our hospital for ACL reconstruction from January 2020 to December 2021 were clustered according to the random number table method. The control cluster (24 patients) underwent postoperative exercise training, while the experimental cluster (24 patients) underwent discrete extracorporeal shock wave therapy on the basis of the control cluster to compare the excellent knee function rate, graft maturity, knee function, pain, gait recovery, knee stability and postural control between the two clusters. Results: The excellent and good rate of knee joint function in the experimental cluster was 91.67% upper than that in the control cluster (62.50%) (P＜0.05). P>0.05); the mean graft SNQ, intra-articular graft SNQ, and femoral end graft SNQ showed no notable variation between the two clusters  (P>0.05); tibial end contrasted with the graft SNQ, the experimental cluster was bottom than the control cluster 6 months after operation (P<0.05); the experimental cluster had joint instability, support use, lameness, joint hinge, bottom joint at 3 months after operation and 6 months after operation The marks of squatting, stair climbing, swelling and pain were upper than those of the control cluster (P＜0.05); the VAS marks of the experimental cluster were bottom than those of the control cluster at 2 months and 3 months after operation (P＜0.05); The TGA marks at 6 months after operation were upper than those in the control cluster (P<0.05); the swing speed of the center of gravity of the foam plane with closed eyes in the experimental cluster was bottom than that in the control cluster at 6 months after operation (P<0.05). Conclusion: The application of ESWT in male patients after ACLR can improve the maturity of the knee tibial end graft at 6 months after operation, which is beneficial to the recovery of knee joint function, reduces postoperative pain, and promotes the improvement of patients' gait.