Heart failure combined with kidney failure does not necessarily require dialysis. Dialysis can be done if the indications for dialysis are met and should be evaluated by a medical professional. Patients with heart failure combined with renal failure may suffer from water retention, water and electrolyte metabolism disorders, resulting in circulatory stasis, chest tightness, edema, dyspnea, etc. Drug treatment includes diuretics (such as furosemide, etc.), vasodilators (such as nitroglycerin, etc.), cardiac medications (such as cediran, etc.), etc. If symptoms can be improved after drug treatment, dialysis may not be indicated. If the symptoms can be improved after drug treatment, dialysis treatment may not be feasible. For patients with end-stage renal disease, hemodialysis can replace part of the excretory function of the kidneys, so as to alleviate clinical symptoms and stop or delay the progress of complications. Indication of dialysis should take into account the remaining renal function status and clinical manifestations, when serious complications, which cannot be controlled by medication, such as volume overload including acute heart failure, i.e., renal failure combined with acute heart failure, may be appropriate to advance hemodialysis. Similarly, dialysis is also feasible when patients with acute renal failure combined with heart failure, blood creatinine ≥442 μmol/L, oliguria for more than 2 days accompanied by excessive body fluids, such as pericardial effusion, heart sounds in gallop rhythm or elevated central venous pressure. Whether heart failure combined with renal failure can be dialyzed needs to be evaluated by a professional physician, and it is recommended that patients go to the hospital for consultation and treatment under the guidance of a professional physician, so as to avoid delaying the condition.