If the patient can tolerate colonoscopy, normal colonoscopy is generally better than painless. Regardless of whether it is painless or normal colonoscopy, after taking laxatives, the colonoscope is accessed through the anus to observe the mucosal condition of the intestinal wall and to clarify whether there is intestinal inflammation and foreign body generation. However, painless colonoscopy patients need to be anesthetized, and if the patient needs to cooperate with the position, it is not as good as normal colonoscopy patients. And painless colonoscopy requires injection of anesthetic drugs, which will increase the occurrence of allergies and adverse reactions, so it is not as good as normal colonoscopy. In addition, normal colonoscopy patients have a certain degree of consciousness, when there is discomfort, can be timely rescue, while painless colonoscopy, need to be monitored to clarify the patient’s state, which may lead to delayed discovery of the condition in a timely manner.