The invention relates to the technical field of clinical medical equipment in gastroenterology departments, and discloses a clinical gastrointestinal decompression device used in a gastroenterology department. The device includes a base, and the left side of the top of the base is fixedly connected with a supporting column; one end, far away from the base, of the supporting column is fixedly connected with a box, and an air guiding box is fixedly connected to the left side of the top of the box; and a partition plate is fixedly connected to the interior of the air guiding box, a sleeve is embedded into the middle of the surface of the partition plate, and the sleeve sleeves a connecting rod. According to the device, the box, the air guiding box, the partition, the sleeve, the connecting rod, roll wheels, a motor, a cam, a slide plate, a first gas-conveying pipe, a second gas-conveying pipe, an absorption liquid storage bottle, a pressure gauge, a gastric tube, a clamping ring, a returnspring, a first check valve and a second check valve are arranged, so that gas in a stomach and intestines is conveyed to the absorption liquid storage bottle through the second gas-conveying pipe and is absorbed by an absorption liquid, and the gas in the stomach and intestines is prevented from being directly discharged to the air to cause a bad smell in a ward.