Objective To investgate the value of interventional therapy in inferior vena cava stenosis or obstruction caused by tumor and management after the operation. Methods 53 patients with IVC stenosis caused by tumor had detailed information. After the guide wire passed through the stenosised part and then undergoing balloon expansion, Gianturco Z stents or wallstents were implanted to undergo venography and measuring pressure after that. Results Technical success was attained in 50 patients, 3 cases was failure because the guide wire couldn't pass through the obstructed region.The technical success rate is 94.3%. 2 patients with IVC stenosis over 10 cm length was placed two stents. In other 48 patients,everyone was placed one stent. The pressure of IVC dropped from (28.66?4.08)cm H 2O (1 cm H 2O =0.098 kPa) before operation to (17.65?4.18)cm H 2O after operation. Through t examination, the difference of IVC pressure before and after treatment has statistic significance( t =3.261, P