A kind of Ce (III) complex with TTA(4)center dot HP (TTA =2-Thenoyltrifluoroacetone, HP =Piperidine) has been synthesized and characterized. DNA-binding properties of CeTTA(4)center dot HP were investigated using UV spectra, fluorescent spectra, thermal denaturation, CV(cyclic voltammetry), viscometry and molecular modeling. The results showed that the binding-mode between CeTTA(4)center dot HP and DNA is intercalation.