Objective: To evaluate the speech function on repairing defects of maxilla and palate with temporalis muscle flap after benign or malignant turmor resection. Methods: The lateral cephalogram and speech intelligibility were detected in 19 cases with the operations of repairing defects of maxilla and palate by temporalis muscle flap, and their recovery of the speech function were analyzed.Results: Among the 19 patients, there were 15 cases (78.00％) with complete velopharynx, 3 cases (15.80 ％ ) with mariginal velopharynx, and 1 case (5.26％) with insufficient velopharynx. The average speech intelligibility was 94.3％, close to the normal speech intelligibility. Conclusion: The operation of repairing defects of maxilla and palate with temporalis muscle flap can reconstruct the phonatory structure, preserve the palate function and restore the speech function after operation.