Based on the equivalent circuit of nanodipole, combine the multi-layer waveguide and resonator structure, a nano-metamaterial solar absorber with high absorptivity and broadband is designed. The unit structure of the absorber is composed of a double hexagonal metamaterial nanocolumnar and a silicon ring, in which the silicon ring is fitted with eight miniature Au nanocolumns. The finite difference time domain method is used to analyze the absorption characteristics of the metamaterial solar absorber in broadband, different-polarized incident light and large-angle incident light. The numerical analysis shows that the absorption band of the absorber is mainly concentrated at 400-1500 nm, and the average absorption rate can reach 94%. The incident light of different polarization states has little effect on the absorptivity of the absorber and the average absorptivity of the absorber can reach 90% at a big incidence angle of ±60°. The high absorptivity of the broadband of the absorber is attributed to the synergetic effect of the slow-wave effect and localized surface plasmon resonance.