Chronic submandibular adenitis is mostly caused by stones, with long-term pain in the submandibular area, local masses that are sometimes large and sometimes small, swelling when eating, purulent secretions overflowing when squeezing the mouth of the submandibular gland ducts, ineffective conservative treatment, and recurrent submandibular gland patients should have the submandibular gland removed surgically. The incision should be made 1.5 cm below the inferior border of the mandible, and the cervical muscle should be separated from the deep fascial surface upwards. The separation should start from the superficial surface and go deeper layer by layer, and the proximal end of the facial artery should be clearly found above the submandibular gland and ligated first and then cut. On the deep surface of the mandibular hyoid muscle, care should be taken to separate and protect the lingual nerve, ligate the submandibular gland duct and excise the deep lobe of the submandibular gland. Hemostasis should be complete, sutured, dead space eliminated, and drainage strips or negative pressure drainage tubes placed. Postoperative antibiotics are applied to prevent infection. Pay attention to bleeding from the wound, whether the floor of the mouth is swollen and elevated, and whether airway patency is affected by bleeding or swelling. If there is any of the above, appropriate measures should be taken promptly.