Objective To investigate the effect and monitoring point of continuous veno-venous hemofil-tration (CVVH) in patients with multiple organ dysfunction syndrome (MODS). Methods In 22 patients with MODS,a double lumen catheter was put into the central vein,and the CWH was performed with the BRAUN Diapact CRRT. The level of BUN,Scr,serum potassium and arterial blood gas were measured 30 minutes before and after CVVH. The plasma TNF-α、IL-1、IL-8 were measured by ELISA. Vital signs were monitored dur-hag treatment process. Results The vital signs of all patients` was stable, the levels of BUN,Scr and serum potassium decreased significantly after CVVH. The plasma concentrations of TNF-α,IL-1 and IL-8 gradually decreased. Conclusions CWH can improve the blood biochemical markers,remove inflammatory cytokines in plasma,stsblize the vital signs during treatment,which is suitable for patients with MODS.