This study is an endeavor to evaluate the risk assessment of hazardous(aflatoxin $B_1$) in medicines from oriental medical prescription which are circulated much recently. For that, twelve globular and granule types, seven liquid types of herbal medicine were bought to compare and analyze the content of aflatoxin aflatoxin B_1), which are harmful to human body. Woo Hwang Cheong Sim Hwan of Aflatoxin $B_1$ concentration lower than the standard accepted by all the products have been detected, B company(tradition) is the concentration of $1.24;{mu}g/kg$, C company $1.04;{mu}g/kg$, A company(tradition) and B company did not detect. And the general pill of aflatoxin B1 concentration lower than the standard accepted by all the products have been detected, S-1 is the concentration of $1.8;{mu}g/kg$, S-2 of $1.04;{mu}g/kg$, S-3 of $0.88;{mu}g/kg$, S-4 of $9.32l;{mu}g/kg$, S-6 of $7.8;{mu}g/kg$, S-5 did not detect. All the products eundan allowed in the concentration of aflatoxin $B_1$ levels were lower than detection, D company of $0.96;{mu}g/kg$, E company concentration was not detected. The liquid product of aflatoxin $B_1$ concentration was found liwer than the standard accepted by all the product, L-3 concentration of $0.8;{mu}g/kg$, K-4 was detected in the $1.16;{mu}g/kg$, L-1 and L-2 is not detected, L-5 concentration of $15;{mu}g/kg$, L-7 is detected as $1.08;{mu}g/kg$ and, L-6 was not detected.