Objective To explore the effect of improved Langenbeck in the early treatment of unilateral complete cleft palate． Methods 65 patients with unilateral complete cleft palate，aged 18-24 months，were selected and performed with improved Langenbeck to repair of cleft palate: after cutting the edge of the first fracture，in the palatal mucosa 1-2mm to the gingival margin，by incising from the canine teeth to the upper back near the jaw of nodules，peel palatal mucoperiosteal flap，nasal mucosa and plow flap were isolated， palatine neurovascular bundle were released，levator palatine velum were reconstructed，and layered suture were closed layer by layer． Results Perforation and rima were observed in 2 cases． 53 cases received early fine sounding recovery and 58 received long term fine sounding recovery． Conclusion Modified Langenbeck can achieve fine sounding effect，reduce barriers to the future development of jaw，and lay foundation for the functional reconstruction after surgery．

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