In this research, we compared the swallowing pattern in 33 normal occlusion adults with that in 29 skeletal Class III malocclusion adults, using computerized videofluoscopy. We found that: 1) in skeletal Class III malocclusion patients, the tongue, the hyoid bone and the mandible were in much lower position than those in normal people at postural position. The gap separation between the upper and lower lip was much larger. So was the space between the upper and lower molars. During swallowing, the tongue tip moved upward and backward, and continually moved back along with the backward movement of the tongue dorsum. This was the typical tongue retraction swallowing pattern in Class III malocclusion. The lips kept separation during deglutition, so did the molar region. 2) Abnormal swallowing pattern in skeletal Angle Class III patients was the adaptable change with the dentoalveolar disharmony, while the long time abnormal swallowing could change dentoalveolar structure.