Objective To apply the WeChat in family rehabilitation after anterior cruciate ligament (ACL) reconstruction. Methods 126 patients accepted ACL reconstruction using quadrupled semitendinosus and gracilis tendons were divided into observation group (n=69) and control group (n=57). The control group received conventional rehabilitation program, and the observation group joined the WeChat group. They were assessed with knee range of motion (ROM), knee stability test, thigh perimeter, Lysholm score and the International Knee Documentation Committee (IKDC) score 3 and 6 months after operation. Results There was a significant difference between groups in ROM of knee flexion (P<0.05) 3 and 6 months after operation, but not in ROM of knee extension (P>0.05). There was no significant difference in thigh perimeter 3 months after operation, but it was significant 6 months after operation. There was significant difference in Lysholm score and IKDC score (P<0.05), but not in the joint stability (P>0.05). Conclusion Direction of rehabilitation with the WeChat Group can significantly improve the compliance, accelerate the rehabilitation process and reduce complications in patients after ACL reconstruction.