Salivary lithotripsy is a disease caused by the deposition of calcified masses in the glands or ducts, 90% of which occur in the submandibular gland, followed by the parotid gland. The main symptom of salivary gland disease is obstruction: the gland is enlarged and swollen when eating, especially when eating acidic food, because salivary stones prevent saliva from draining freely, and saliva secretion is increasing. The more food stimulates saliva secretion, the more severe the symptoms. In the case of submandibular gland, it may be accompanied by ipsilateral tongue or tongue pain and radiates to the ipsilateral ear and inside the ear. Since complete obstruction of the salivary glands is not possible, saliva can gradually flow out, and after the secretion decreases, the salivary glands gradually shrink and the pain disappears. The salivary glands often have chronic inflammatory manifestations, such as enlargement of the gland, hardening, light pressure pain; redness and swelling of the duct opening, and a little pus can be pressed out of the duct. Acute attacks of chronic salpingitis may present with local redness, swelling, and increased pain. Salivary stone exists for a long time, can be due to the influence of long-term inflammation, so that the glandular tissue shows degenerative changes, or even fibrosis, the gland becomes hard, the duct becomes hard nodular cords, obstruction symptoms also gradually disappear. However, most of them need to be removed surgically. In cases where the posterior end of the duct is close to the gland or intra-glandular salivary stone, multiple salivary stones, recurrent swelling of the salivary gland after ductal salivary stone removal and glandular fibrosis, glandular removal (excision) with salivary stones is required. It can be seen at any age, but is more common in young and middle-aged people between 20-40 years old. The duration of the disease may be a few days or several years or even decades. Small salivary stones usually do not cause obstruction of the salivary ducts and are asymptomatic. In the case of duct obstruction, a series of symptoms and signs of salivary dysfunction and secondary infection can occur: ① When eating, the gland is enlarged and the patient feels distended and painful. Soon after stopping eating, the gland will recover on its own and the pain will disappear. However, in some cases of severe obstruction, the swelling of the gland can last for several hours or days, and even cannot subside completely; ② the mucous membrane of the duct opening is red and swollen, and a small amount of purulent secretion can be seen overflowing from the duct opening when the gland is squeezed; ③ stones in the duct, hard lumps can often be palpated with both hands, and there is pressure pain; ④ saline stone obstruction causes the gland to stimulate infection, and recurrent episodes. Inflammation spreads to adjacent tissues and can cause infection in the submandibular space; patients with chronic submandibular adenitis have mild clinical symptoms, mainly manifesting as recurrent swelling during feeding and hard nodular masses on examination of the gland. The clinical diagnosis of submandibular salivary stone complicating submandibular adenitis can be made based on the characteristics of swelling and pain associated with the submandibular gland during feeding, the overflow of pus from the duct orifice, and the palpation of the ducts with both hands to retrieve the nodules. In mild cases, X-ray examination should be performed. The former is used for salivary stones in the more anterior part of the submandibular duct, and the latter is used for salivary stones in the posterior part of the submandibular duct and in the gland. Salivary stones with low calcification, so-called negative salivary stones, are difficult to show on radiographic plain films. After the acute inflammation has subsided, salivary gland imaging can be performed, and the salivary stone appears as a round, ovoid, or pyknotic filling defect. In cases of diagnosed salivary stone disease, salivary angiography is not performed to avoid pushing salivary stones into the posterior ducts or into the gland. Very small salivary stones can be treated conservatively by giving the patient a cotton swab dipped in citric acid or vitamin C tablets, or by eating acidic fruits or other foods to encourage salivary secretion, which is expected to expel itself. Salivary stones that can be palpated and are equivalent to the area before the second mandibular molar can be removed by intraoral catheterization. For salivary stones located in the submandibular gland or in the posterior part of the submandibular duct, repeated infection of the submandibular gland or secondary sclerosing submandibular adenitis and atrophy of the gland, which has lost the function of ingestion and secretion, submandibular gland resection can be used. In recent years, some scholars have adopted new treatment methods such as lithotripter lithotripsy, laser lithotripter lithotripter and salivary gland mirror duct extraction, all of which have achieved certain results, but more experience has yet to be accumulated.