Abstract: The present invention provides: a composition for transarterial chemoembolization, comprising two types of biodegradable microbeads having different anticancer drug release characteristics; and a preparation method therefor. According to the present invention, a composition for transarterial chemoembolization exhibiting a desired anticancer drug release characteristic can be effectively prepared by controlling the mixing ratio of first and second biodegradable microbeads. Therefore, the present invention can be usefully applied to the transarterial chemoembolization of liver cancer.