In general, do enteroscopy laxative 2000ml drink can be appropriate water, but should not be too much, specific should be based on the guidance of the doctor. Enteroscopy, is used to observe the intestinal mucosa congestion, edema, erosion and vascular texture and hemostasis, polyp removal of a kind of endoscopy, before doing enteroscopy need to be cleaned of intestinal contents, such as oral laxatives to promote defecation, so as to avoid feces and so on to affect the field of vision, resulting in misdiagnosis and other situations. Generally, 4 to 6 hours before the colonoscopy, oral polyethylene glycol electrolyte solution for intestinal cleansing, after drinking laxatives, you can drink appropriate water, which is conducive to the full dissolution of the laxative, so as to better play the effect of the drug. However, attention should be paid to the amount of water, should not drink too much water, so as not to cause water residue in the intestinal tract, affecting the colonoscopy field of view, thus affecting the results of the examination. Bowel preparation before colonoscopy should be standardized and taken under the guidance of the doctor.