A local field enhancement structure with dual-band of near infrared and terahertz is designed, which consists of a micron-scale rectangular groove structure and a nano-scale double disk structure. The terahertz resonance enhancement is realized by using the micron-scale rectangular groove structure, and the nanoscale double disk structure is combined with it to achieve optical capture in the near infrared band. The structure is simulated and analyzed by the finite difference time domain method. Research results show that the dual-band local field enhancement structure has a resonance peak at 0.63 THz and strong local field enhancement, and the maximum electric field enhancement is 1800. When the incident light intensity in the near infrared band is 1 mW/μm², the depth of the potential well reaches 30 kBT, which can achieve stable trapping of particles. The results have a certain reference significance for the detection of THz vibration spectrum of biological macromolecules.