In this paper， we propose a metamaterial terahertz broadband bandpass filter based on dual metallic rings and the filter provides feasible solution for the insertion loss and bandwidth problems of a terahertz filter. A theoretical model of the dual metallic rings metamaterial can be constructed using a frequency-domain finite-difference method. By changing the distance between the two rings， the radii of two rings， and the thickness of the polyimide substrate， we can determine the geometric parameters of a broadband and high-transmittance terahertz filter. The results show that the filter can achieve a passband bandwidth of 0.54 THz at 0.1?1.2 THz and that the terahertz-wave transmittance in the passband can be as high as 93%， effectively improving the overall performance of the terahertz broadband filter.