The invention relates to a gastric lavage device for the digestive department and belongs to the technical field of medical instruments. The gastric lavage device for the digestive department comprises a machine body, a washing tank, a waste liquid tank and a combined stomach tube. A movable base is arranged on the lower side of the machine body, a power box is arranged on the upper side of the movable base, a standby power box is arranged on the lower side of the power box, a charging converter is arranged on the upper side of the standby power box, a power case is arranged on the upper side of the charging converter, a controller is arranged on the upper side of the power box, a tool kit is arranged on the left side of the controller, a washing liquid adding port is formed in the upper side of the washing tank, a suction pump is arranged on the upper side of the waste liquid tank, a washing tube is arranged in the middle of the combined stomach tube, a waste liquid tube is arranged on the outer side of the washing tube, and a suction filter screen is arranged at the upper end of the waste liquid tube. The gastric lavage device is simple in structure and convenient to operate, the condition in the gastric cavity can be checked in real time, operating time is shortened, gastric lavage efficiency is improved, pain of a patient is relieved, medical risks are reduced, the size is small, movement is convenient, and the device can be conveniently operated by medical staff.