Objective To evaluate the efficacy of bioabsorbable plates in the treatment of mandibular condylar neck fracture.Methods Bioabsorbable plates internal-fixation was performed in 30 patients with mandibular condylar neck fracture.Through the postoperative X-ray examination and follow-up the clinical effects were analyzed.Results The reexamination at 6 months after operation showed excellent effect was found in 28 patients,good in 2 patients, poor in 0 patient;the reexamination at 12 months after operation showed excellent in 29 patients,good in 1 patients, poor in 0 patient.Conclusion Bioabsorbable plates shows good effect in condylar neck internal-fixation.It was no necessity for secondary operation.