Composition of traditional Chinese medicine for reducing blood lipid with components of the crude drug of artemisinins and the crude drug of ursolic acid, wherein the ratio of the crude drug of artesunate and the crude drug of ursolic acid is 1:25-25:1 by weight. The preparation method of such composition includes the following steps: the crude drug of artesunate and the crude drug of ursolic acid are mixed at the weight ratio mentioned above, comminuted, then screened through 120 mesh sieve to obtain the composition or the crude drug of artesunate and the crude drug of ursolic acid are weighed at the weight ratio mentioned above, comminuted, screened through 120 mesh sieve separately, then mixed and screened for three times to obtain the composition. The composition of the present invention can be formulated into formulations for injection, oral administration with pharmaceutically acceptable carriers, and can be used for preparing medicaments for reducing blood lipid.