Polypropylene (PP)/1, 4-bis(3-tetradecylimidiazolium-1-yl) butane bromide (Br[C(14)im](CH2)(4)[C-14-im]Br) blends were prepared via melting blending,and then the structure and properties of the blend were characterised and tested. Results of testing indicate that Br[C-14 im] (CH2)(4) [C-14 im] Br could have a heterogeneous nucleating effect in the PP matrix. Moreover, PP was readily to form alpha-crystal in the PP crystallizing process with the help of Br[C(14)im](CH2)(4)[C(14)im]Br. XRD data show the crystallizing process of PP could be affected by Br[C(14)im] (CH2)(4)[C(14)im]Br, and thus decreased the crystallinity of PP. DSC results show the melting point and the crystallization temperature of PP/Br[C(14)im] (CH2)(4)[C(14)im]Br blends was close to that of neat PP, this maybe due to the good compatibility of PP to Br[C(14)im](CH2)(4)[C(14)im] Br with long alkyl chains. In addition, the presence of Br [C(14)im] (CH2)(4)[C(14)im]Br could improve the antistatic properties of PP apparently, and the surface resistivity of the PP was decreased to 8.97 x 10(9) Omega cm when the content of Br[C(14)im](CH2)(4) [C(14)im]Br in the blends was about 3 phr. As for the mechanical properties, the tensile strength decreased while the impact strength of materials presented the opposite results with Br[C(14)im](CH2)(4)[C(14)im]Br incorporated into it. DMA results show the glass transition (T-g) of PP also decreases when 3 phr Br[C(14)im](CH2)(4)[C(14)im]Br exists in its matrix. Therefore, Br[C(14)im] (CH2)(4)[C(14)im]Br has the plasticized effect on the PP matrix In our experiments.