Recruited patients are divided into two arms depending on laryngeal carcinoma's T1 and T2 stages. Two interventions were undergone, including transoral endoscopic laser cordectomy and open partial horizontal laryngectomy (OPHL). During the pre-and post-operative time, patients performed measurements of swallowing function, including direct subglottic pressure, Eating Assessment Tool-10(EAT-10) questionnaire, swallowing ability to different textures, and fiberoptic evaluation of swallowing(FEES). Patients undergo subglottic pressure measurement and swallowing function evaluation three times: 3-7 days, two months, and six months after surgery. Patients also performed measurement voice acoustic analysis and subjective assessment one-day pre-operation and six months post-operation.