Objective Observe the effect and the indications of intermittent short veno-venuous hemofiltration(ISVVH) in severe acute pancreatitis(SAP). Methods APACHE II scores≥14 and fluids imbalance were respectively used to define as the indication of starting hemofiltration and ending hemofiltration. In 39 patients with SAP,19 underwent ISVVH(IS group),and the other 20 patients were not accepted hemofiltration (N group). APACHE II scores, Balthazar CT grades and the plasma levels of procalitonin(PCT), TNF-?, IL-6, IL-8, IL-1ra, IL-2 and IL-10 were observed. Results At admission and 2d after admission, APACHE II scores in IS group and N group were (13.8?3.1)and (17.8?3.2) ( P