Objective To study the short-term effectiveness of absorbable anchor in repairing of partial anterior cruciate ligament (ACL) rupture. Methods Between December 2013 and February 2015, 22 patients with partial ACL rupture were repaired with absorbable anchor under arthroscopy. There were 12 males and 10 females with an average age of 27.5 years (range, 20-44 years). The injury located at left knee in 8 cases and at right knee in 14 cases. The time from injury to admission ranged from 2 to 13 days (mean, 9.8 days). Sixteen partial ACL ruptures combined with meniscus injury. The effectiveness was assessed by Tegner score, Lysholm score, International Knee Documentation Committee (IKDC) score, visual analogue scale (VAS) score, and MRI, as well as knee laxity was evaluated by KT-1000. Results All incisions healed at stage Ⅰ without any complication. All patients were followed up 12 months. ACL rerupture did not occurred during follow-up. There was no significant difference in Tegner score, Lysholm score, and IKDC score between before injury and at 12 months after operation (P>0.05). And the median satisfaction VAS score was 9.5 (range, 9-10). The tibial anterior translation difference was 0.5 mm (range, 0-6 mm). MRI showed that the scarring and continuity of the ligament were rated as grade 1 in all patients. Conclusion Arthroscopic repairing by absorbable anchor is a feasible method for partial ACL rupture, with ideal knee function, good satisfaction, and satisfactory short-term effectiveness.