When bleeding from the lower gastrointestinal tract, the first thing is to distinguish the amount of bleeding. If the bleeding is large, it is necessary to stop the bleeding first and then find out the cause and site for targeted diagnosis and treatment, if the bleeding is small, you can do the relevant examination first to clarify the cause of the site before treatment. When the bleeding volume is greater than 1000 ml, it is necessary to actively replenish blood volume, including blood and fluid transfusion, and correct water and electrolyte disorders. Warmth, oxygen, lower gastrointestinal bleeding caused by intestinal polyps can be removed by trap, smaller polyps can be removed by high-frequency electrocautery, or direct spraying of vasoconstrictors on bleeding foci, microwave hemostasis and other means to stop bleeding, and also local injection of sclerosing agent under the mucosa can be used to stop bleeding. If the bleeding is caused by inflammation, fluid should generally be given, and anti-inflammatory and vasoconstrictive drugs such as adrenocorticosteroids should be applied, and blood transfusion and rest should be given. For those who bleed from internal hemorrhoids, a complication of rectal venous tumor, 0.1% ephedrine hydrochloride solution with saline soaked cotton balls can be used to stop bleeding by compression for more than 24 hours, which can have the effect of temporary hemostasis. In conclusion, lower gastrointestinal bleeding should be treated accordingly according to the cause of the disease, not simply to stop the bleeding, which may aggravate the condition, cause internal bleeding and accumulation of blood, and cause unnecessary trouble.