In this paper, the effects of material, radius and relative height of a built-in metal/dielectric concentric cylinder on extraordinary transmission properties of metallic hole array were investigated with the finite-difference time-domain(FDTD)method. It is found that the structure, compared to the structure with built-in single metal concentric cylinder, single medium concentric cylinder or dielectric/metal concentric cylinder, shows a good extraordinary transmission property. This suggests that resonance effect of surface plasmon polariton and localized surface plasmon are further enhanced by the built-in metal/dielectric concentric cylinder. It shows the material of metal and dielectric has a distinct impact on the extraordinary transmission property. When the metal cylinder material is Au and the refractive index of the dielectric cylinder is relatively small, the transmission performance is better. The radius is the major factor affecting the transmittance and the position of the resonance peak. The radius is larger, the resonance peak redshifts more obviously, but the transmittance firstly increases and then decreases steadily. At the same time, relative height of the metal/dielectric cylinder also influences the transmission, and the transmission performance is better when the height of the metal cylinder is 60nm.