Objective To analyze the effect of costal cartilage-carved nasal tip polygonal graft on nasal shaping effect in patients with poor nasal tip morphology. Methods A total of 78 patients with poor nasal tip morphology admitted to the Department of Cosmetology of Zibo M'Crown Medical Cosmetology Hospital Co., Ltd. from January 2023 to May 2024 were selected as the research subjects, and they were divided into the control group and the observation group according to different filling materials, with 39 patients in each group. The control group was filled with expanded polytetrafluoroethylene prosthesis, and the observation group was filled with costal cartilage-carved nasal tip polygonal graft. The nasal shaping effect, perioperative indicators, PSQI score and satisfaction were compared between the two groups. Results The postoperative nasolabial angle, nasofacial angle, frontonasal angle and nasal dorsum height in the observation group were better than those in the control group (P <0.05). The wound healing time and hospitalization time in the observation group were better than those in the control group (P <0.05). The PSQI scores of the observation group at 1 week and 1 month after operation were lower than those of the control group (P <0.05). There was no significant difference in PSQI score between the two groups within 24 hours after operation (P >0.05). The satisfaction rate of the observation group was 94.87%, which was higher than 76.92% of the control group (P <0.05). Conclusion For patients with poor nasal tip morphology, the application of costal cartilage-carved nasal tip polygonal graft filling can accurately shape the nasal morphology, promote wound healing, shorten hospitalization time, improve postoperative sleep quality, thereby enhancing satisfaction, which is worthy of clinical application.