1. On-line HDF 2. Self-checking function; 3. Carbonate dialysis; 4. Double needle dialysis; 5. Liquid level detector; 6. Bubble detector; 7. Blood leakage detector; 8. Temperature and electric conductivity monitoring; 9. Arterial pressure, venous pressure and transmembrane pressure monitoring; 10. Rolling blood pump; 11. Heparin pump; 12. Dehydration amount controlled by capacity; 13. Automatic disinfection cleaning program;