Objective:The aim of this study for observing laryngeal morphology, and motion characteristics after supracricoid partial laryngectomy with cricohyoidoepiglottopexy(SCPL-CHEP),exploring the relevant factors affecting the morphology of new laryngeal. Method:Choose 46 cases of patients with laryngeal cancer for SCPL-CHEP as the object of study, dynamic laryngoscope were performed in all the patients, to observe the movement of laryngeal pronunciation (neoglottis closure , supraglottic situation) . Combined with the patient's clinical data, the relevant factors that may affect the pronunciation and movement characteristics of the new throat were analyzed. Result:46 patients after SCPL-CHEP were included in the study. The neoglottis completely closed in 31 cases (67.4%), insufficiency closed in 15 cases (32.6%). Supraglottic vibration in 33 cases (71.7%), 13 cases (28.3%) of supraglottic structure vibration free.The Spearman 's analysis showed that, neoglottal closure status was positively correlated with age and subglottic lesions (r=0.313, P=0.034; r=0.592, P=0.000), and negatively correlated with the postoperative time (r=-0.446, P=0.002). The supraglottic vibration was negatively correlated with postoperative radiotherapy. Conclusion:The anatomy of neolarynx changes greatly,the function of neolarynx only depends on the movement of he remaining cricoarytenoid unit and arytenoid mucosa vibration. The age, tumor type, and postoperative time are related factors that affect glottic closure. Postoperative radiotherapy can reduce the occurrence of supraglottic vibration.