Recurrent patellar dislocation usually results in damage to the patellofemoral articular surface pressure, and it has a wide range of etiologies, including: high patella, hypoplastic slide, increased Q-angle, increased TT-TG values, medial patellofemoral ligament dysplasia, medial femoral oblique bundle dysplasia, lateral femoral muscle dominance, lateral contracture (IT/lateral patellar support band/lateral femoral muscle), lower extremity force lines, femoral external rotation or tibial internal rotation, knee valgus, gait abnormal gait, etc. The treatment options for recurrent patellar dislocation include soft tissue approaches: lateral patellar support band release, medial femoral muscle rearrangement, MPFL repair or reconstruction, medial patellar support band tightening; and bony approaches: tibial tuberosity displacement/patellar ligament displacement; and pulley plication. Treatment for patellar dislocation needs to follow the following principles: comprehensive examination, integrated consideration, cause-specific treatment, and simplicity before complexity. The specific options are: 1. normal patellar height, normal TT-TG :MPFL; 2. high patella, normal TT-TG : MPFL + inferior displacement of tibial tuberosity; 3. normal patellar height, increased TT-TG : internal displacement of tibial tuberosity; 4. high patella, normal TT-TG : MPFL + inferior displacement of tibial tuberosity; 5. high patella, normal TT-TG : MPFL + inferior displacement of tibial tuberosity. 4, High patella, increased TT-TG/inferior displacement of tibial tuberosity; 5, Pulleyplasty: Type B,D, postoperative recurrence.