Objective To explore the role of sCD44v6 in the diagnosis of colorectum cancer. Methods ELISA was used to detect the concentration of sCD44v6 of 81 patients after or before surgery.Results The level of sCD44v6 in the group of colorectum cancer was 200.5?31.1 ng/ml, which was higher than that of normal controls (45.6?9.5ng/ml) and that of patients with coloritis (48.3?7.6ng/ml). The concentration of sCD44v6 in the group of colorectum cancer with metastasis(280.1?26.9ng/ml) was higher than that of the group without metastasis(160.9?34.4ng/ml). The level of sCD44v6 was related to tumor burden.Conclusions The level of sCD44v6 is closely related to colorectal cancer and its metastasis. It would be useful in the diagnosis, prognosis, and forcasting of metastasis.