Two kinds of metal/dielectric photonic crystals (MDPhC) combined with round hole arrays (square and hexagonal) are designed to investigate the effect of array type on extraordinary transmission characteristics for MDPhC. Two types of gold/silicon dioxide/silicon photonic crystal with the same structural parameters composed of square and hexagonal hole arrays were fabricated using MEMS technology,and their reflectance spectrums were measured using Fourier transform infrared spectrometer. At the same time,the numerical simulation was used for the two structures by finite difference time domain method. Compared with square round hole array,both the theoretical simulation results and the experimental results prove that MDPhC composed of hexagonal round hole array can obtain better effect of light transmission enhancement and narrower transmission peak.