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Objective To investigate the effect of controlled passive motion in the postoperative rehabilitation of digital flexor tendon injury.Method 69 patients with 106 fingers involved were reviewed in this study.Average interval between injury and first stage operation was 6.9 months(range 1 to 24 months).Combined with digital nerve repair and scar resection,digital flexor tendon resection and Hunter rods implantation were performed in the first stage operation.During the second stage operation,which performed 2 to 6 months later,palmaris longus or plantaris were grafted into the pseudo sheath formed by Hunter rod.Results All cases were followed for 6 to 24 months(average 11months).Evaluation based on TAM was excellent or good in 84% ,fair in 12% ,poor in 4% . Conclusions Our findings suggest that early controlled passive motion could effectively promote postoperative rehabilitation after digital flexor tendon repair surgery and prevent postoperative adhesion formation.