Abstract: The title compound was synthesized by the reaction of 1,6-dichlorodode camethyl hexasilane with the Grignard reagent of p-bromoanisole. The physical properties of this compound were reported and its structure was determined by four cycle diffractometer. The crystal is monoclinic system, space group P2₁/C,the parameters of crystal cell are: α=8.856(2)Å, b=11.886(2)Å, C=16.823(3)Å; β=99.04(Ⅰ)°; V=1749ų, Z=2, D_c=l.077g·cm^-3. The final Rfactor is 0.041. The structure analysis showed that the molecule is central symmetric. The stable conformation is staggered.The planes of benzene ring and Si(l)-Si(2)-Si(3) are almost perpendicular each other. In this case the σ_Si-Si-π interaction of benzene ring and σ_Si(1)-Si(2)bond is more favourable.