Colonoscopy without 3000 ml of water can assist in bowel clearance through enemas, exercise, and laxatives. 1. Enema: colonoscopy can not finish 3000 ml of water, if the bowel movement is yellow loose stool, bowel preparation is not good, need to clear the intestinal contents of the bowel through corkscrew or warm water or soapy water enema. 2. Exercise: colonoscopy can not drink 3000 ml of water, if the intestinal tract is not well prepared, you can promote intestinal excretion through appropriate jumping, walking. 3. Laxatives: Poor bowel preparation can promote gastrointestinal motility through oral laxatives such as lactulose oral solution and mosapride tablets. The use of drugs under the guidance of a doctor, such as cardiac arrhythmia, cardiac function seriously reduced patients can not take oral mosapride tablets. 4. Adjustment of drugs: adjust the bowel cleansing drugs such as sodium phosphate oral solution and mannitol, do not need to drink so much water. There are many other ways to deal with the intestinal mirror can not drink 3000 ml of water, if the intestinal preparation is not good can be assisted by enema purging, due to individual differences, different conditions, intestinal preparation is not good should be timely to the doctor’s feedback on the intestinal preparation, to seek help.