The stomach is the organ with the highest incidence in the digestive system, and the discomfort caused by chronic gastritis and gastric ulcer often plagues people and affects their daily work and life. Gastroscopy and barium meal are recognized as the examination methods for stomach and duodenal diseases; gastroscopy can observe the lesions on the mucosal surface of esophagus, stomach and duodenum under direct vision, and can make clear diagnosis of chronic gastritis and upper peptic ulcer, and can spray to stop bleeding on the mucosal surface and obtain pathological results by tissue biopsy on the suspected malignant parts, which has certain diagnostic and therapeutic values. Barium meal is an X-ray radiography after oral barium administration, which can observe the mucosal surface of the upper gastrointestinal tract, make imaging diagnosis of lesion signs on the mucosal surface, and make indirect imaging diagnosis of elevated lesions and depressed lesions in the wall of stomach and duodenum. However, gastroscopy and barium meal examination cannot observe the vascular structure and lesions on the lower layer of the mucosal surface, and the scope and physical nature of the masses in the stomach wall cannot be clarified. Infants and young children, as well as the elderly and frail, often give up the examination because they cannot cooperate. Gastric and duodenal ultrasound examination program, which combines non-invasive and simple ultrasound examination technology with ultrasound co-developer filling the gastric cavity for gastric and duodenal examination, meets the needs of some people who cannot undergo gastroscopy and barium meal examination. After a controlled analysis of the follow-up results, the diagnostic compliance rate of gastric cancer (3cm in diameter) or more reached 96%, the diagnostic compliance rate of gastric and duodenal ulcers (2mm in diameter or more) reached 93-95%, the diagnostic compliance rate of gastric polyps, gastric mucosal cysts, and mass lesions of the gastric wall reached almost 100%, and the compliance rate of superficial gastritis reached 88%. Gastric and duodenal ultrasound diagnosis, combined with the results of gastroscopy and barium meal, plays a complementary role and improves the means of detecting gastric and duodenal diseases. The filling method of gastric and duodenal ultrasound detection is to judge the normal or not by observing the glossiness of the mucosal surface of the digestive tract, the thickness of the canal wall, and the hierarchical structure, and the image is intuitive and clear, which is a non-invasive, non-painful, non-damaging, easy to operate, and repeatable examination method; it is an effective screening means for gastroduodenal diseases, and has obvious advantages compared with barium meal; the detection of lesions is precise in positioning, which can provide clinical surgery It is an effective screening method for gastroduodenal diseases, and has obvious advantages compared with barium meal; it can provide important information such as the scope of local lesions and depth of infiltration for clinical surgery. The ultrasound coacervant used for ultrasound examination of stomach and duodenum is composed of Chinese herbs and cereals such as Coix seed, Chinese yam and Chen Pi, which has the effect of dipping dampness and strengthening spleen, soothing tendons and removing paralysis, with good taste and no side effects to human body. After filling the gastric cavity, it can exclude the interference of gas and mucus in the gastric cavity, improve the contrast effect, facilitate the display of the mucosal surface of the digestive tract and the hierarchical structure of the canal wall, and help the detection and diagnosis of diseases. Indications for examination: fasting on the day of examination; those with stomach discomfort, poor appetite, and wasting, especially suitable for the elderly and young children who cannot accept gastroscopy and barium meal examination, those with previous history of upper gastrointestinal tract diseases, and those with postoperative follow-up observation of the stomach can be examined. Relative contraindications: acute phase of upper gastrointestinal bleeding, pyloric obstruction and vomiting, acute gastric dilatation, etc.