The invention provides an intragastric calculus compression bag, and belongs to the technical field of medical equipment. The intragastric calculus compression bag comprises a compression bag body, pressurization bags, pressurization tubes, pressurization valves and a traction strap. The compression bag body is made of a paper-thin flexible cloth material, after the compression bag body is compressed, the size of the compression bag body is decreased, the compression bag body is soft, and when the compression bag body is put into the stomach, operation is convenient; the compression bag body is large in size and capable of containing larger calculi after being unfolded. The compression bag body is of a two-layer structure, an enclosed cavity is formed, and objects contained in the pressurization bags can be deformed after pressurization is conducted. An inner crinkle cloth layer protrudes inwards after pressurization, so that the calculi form cylinders with the diameter of nearly 1 cm and can be smoothly taken out through the esophagus. All enclosed units are pressurization units and are coated with different colors, and therefore pressurization parts can be determined for accurate pressurization. The portions, outside the pressurization bags, of the pressurization tubes are connected into a whole from an opening of the compression bag body, parallelly arranged to the position 60 cm away from the opening of the compression bag body and shaped like a strap and can be attached to a gastroscope body, the occupied volume is the minimum through the mouth pharynx and the esophagus, and mucosal tissue damage can be avoided. By means of the traction strap, the calculi can be taken out more conveniently and rapidly.