Objective: This paper introduces the surgical method of lateral nasal wall resection by reversing the inferior turbinate-nasolacrimal duct complex flap. Method: This study included 11 patients diagnosed with maxillary sinonasal Inverted papilloma (MSIP) from June 2020 to January 2024 with concealed tumor base. In all patients, the tumors were resected by the anterior lacrimal approach of reversing the inferior turbinate-nasolacrimal duct complex flap. After exploring the base of the tumor, the anterior, posterior and lower boundaries of the inferior turbinate-nasolacrimal duct were identified and cut, exposing and freeing the membranous nasolacrimal duct to accomplish the aim of reversing the inferior turbinate-nasolacrimal duct complex valve. With an expansion of the surgical field, the tumor was completely resected and the bone attached to the tumor base was cauterized. Finally, the inferior turbinate-nasolacrimal duct complex flap was repositioned and simply sutured. Results: This technique can be used for