The utility model discloses a mouthful lavage improvement device is made to colon, including making mouthful chassis and main part, the main part is including inserting the interior cavity cylinder of intestines tube and keeping somewhere the lid outside the intestines tube, the lid connect the cavity cylinder keep away from the stomach wall end and with the common opening of cavity cylinder outside the stomach wall, the lid with make mouthful chassis and be equipped with the first buckling parts and the second buckling parts that can seal the lock each other respectively, the opening part of lid is equipped with the one -way valve that can open and close the passageway of cavity cylinder, still includes the cavity connecting piece, the both ends of cavity connecting piece are equipped with the third buckling parts and the fourth buckling parts that can seal up the lock respectively with first buckling parts and second buckling parts, be equipped with the opening on the lateral wall of cavity connecting piece, the opening is connected with just sleeve bag of collection. The utility model discloses a mouthful lavage improvement device is made to colon easily regulates and control, and the tightness is good, the rapid operation, and economy, the lavage effect is abundant to and it is pleasing to the eye clean.