The correct way to cleanse the bowel with magnesium sulfate is to dilute and mix the magnesium sulfate medication with warm water and then take it at once, and drink a lot of about 2 liters of water half an hour after taking the medication. Magnesium sulfate is a laxative to drink before doing colonoscopy, usually drink magnesium sulfate an hour later, there will be a significant response, can play the role of excretion of bowel cleansing. Dilute and mix magnesium sulfate with warm water after taking the drug, drink a lot of water about 2 liters in half an hour, can accelerate the cleaning of the intestinal tract. Some patients taking magnesium sulfate intestinal cleansing may be dehydrated, can be supplemented with salt to prevent electrolyte disorders. In addition, the use of magnesium sulfate bowel cleansing is prohibited for those with intestinal bleeding, acute abdomen and pregnant women and menstruating women. The use of magnesium sulfate bowel cleansing, it is recommended that patients under the guidance of a doctor, to avoid self-medication, resulting in serious consequences.