By means of SKOV3 subcutaneous xenografts in nude mice, both carcinoma cells and cell suspensions were administrated intraperitoneally to establish a model of metastatic ovarian carcinoma with ascites. The intraperitoneal metastasis and cancer cells in the ascitic fluid were all prove to be adenocarcinoma by microscopic and electromicroscopic examinations. The immunohistochemical and immunocytochemical stainings with monoclonal antibody COC166-9 were the same as SKOV3 cells. The median survival of these nude mice was 68.7 days. This may serve as a good experimental model for testing chemotherapy as well as immunotarget therapy. Similar results obtained by xenografts of OSC2. 40 nude mice were included in this study.