By mean of focused ion beam (FIB) etching,the samples were prepared on a 120 nm-thick gold film. The comparison of optical transmission shows that the circular hole arrays,which possesses the six-fold rotational symmetry and central symmetry,has higher transmittance than the two periodic structures′. Its peak efficiency is about five times larger than that of the square hole arrays. It can be attributed to the stronger constructive interference of multiple scattered waves in a higher symmetrical hole structure. The position of the enhanced peak for the circular hole arrays locates in the visible region,while that of square hole arrays is in the infrared region.