Before the colonoscopy need to drink polyethylene glycol electrolyte proteins for bowel preparation, the correct method is needed first fast and then slow, with appropriate activities, etc.. Before colonoscopy, you need to take polyethylene glycol electrolytes to empty the feces in the intestines, until the feces is clear water without fecal sludge; during the process of taking polyethylene glycol electrolytes, you should drink water fast and then slow down, it is recommended that you take 1,000 milliliters of liquid within one hour, and drink 250 milliliters of the remaining liquid every 15 minutes. Appropriate activities should be carried out during the course of taking Polyethylene Glycol Electrolyte Dispersant, which can help to promote intestinal peristalsis, and can also alleviate the symptoms of abdominal distension caused by drinking a large amount of liquid within a short period of time. Patients who need to undergo colonoscopy should do so under the guidance of a doctor.