Objective: This study aims to review the magnetic resonance imaging of normal grafts with different periods of signal characteristics and complications after anterior cruciate ligament reconstruction. Methods: The imaging data of 299 patients who underwent MRI for reexamination after the ACLR were reviewed, classified according to the different manifestations of graft complications on MRI, described their signal on T1 and T2, and combined with their clinical symptoms. Results: In 299 patients, a high signal on the T2 of the graft could be observed at different times. Signal was highest at 4-6 months postoperatively and gradually decreased thereafter. Post-transplantation complications were observed in 66 (22.10%), of which 5 (1.67%) had an anterior displacement of the tibial tunnel and 1 (0.33%) had a slightly posterior position of the tibial tunnel. Cyclops was seen in 16 (5.35%), re-rupture of the graft occurred in 10 (3.34%), and one (0.33%) had a postoperative infection. Cystic signal in the tunnel were present in 33 (11.04%) at various times postoperatively, including 3 in the femoral tunnel alone, 27 in the tibiofemoral tunnel alone, and 2 in both tibiofemoral and femoral tunnels (one of which was a double bundle reconstruction). Cystic signals in the tibiofemoral tunnel occurred as early as 5 months postoperatively. One person had a few cystic signal in the femoral tunnel on T2WI after 3 years of the operation, but on MRI review at a further interval of one year ,it was not significantly demonstrated. There are two patients who underlying anterior displacement of the tibial tunnel had both re-rupture and Cyclops of the graft.