We investigated liver protection effect of the Hovenia dulcis Thunb extraction which has treated with carbon tetrachloride ($CCl_4$, 1.0 ML/kg) in SD male rat (20 weeks). We observed the amount of leukocyte, erythrocyte, hemoblobin and hematocrit are increased and the number of plaque is decreased for treatment of $CCl_4$, However, after treatment of Hovenia dulcis Thunb extraction (15 mL/kg), we have same result that of control group which has treated with $CCl_4$ The blood biological data showed that the value of AST (Aspartate aminotransferase), ALT(Alanine aminotransferase) and LDH (Lactate dehydronase) are increased significantly for the negative control group compared to that of control group. For experimental group, respectively, In addition, it was confirmed that the recovery effect of a mysterious death of an interstitial cell of the experimental group is to be compared to that of the negative control group for a sample of pathological tissue.