Hemofiltration refers to the filtration of blood, and since the severity of the disease varies from patient to patient, there is no best number of hemofilters. Generally speaking, four times a month is good. Hemofiltration refers to the process of drawing the patient’s blood out of the body through a specific purification device, purifying the blood through the purification device, and then infusing the blood back into the patient’s body. Through hemofiltration, substances in the blood that are harmful to the human body can be removed from the body, thus providing treatment for various toxic diseases, such as severe metabolic acidosis, severe metabolic alkalosis, and drug intoxication. Hemofiltration can effectively remove medium and large molecule toxins from the body, during which a certain amount of dehydration will occur, although it will not be as thorough as hemodialysis, so it is important to control the amount of water consumed when doing hemofiltration. Generally speaking, most patients need to do hemofiltration four times a month, which is better and can effectively protect the cardiovascular and cerebral vessels. In the hemofiltration, patients should maintain a healthy life and diet, more rest, eat more fresh vegetables and fruits, avoid overwork, and maintain a good mood, the specific need to do how many times the hemofiltration treatment also need to follow the doctor’s instructions.