ing at the shortcomings of low absorptivity and narrow working band for a single structure nano-antenna, we propose a multi-slot butterfly dipole nano-antenna by the fusion of the multi-slot structure and the butterfly dipole. The multi-slot butterfly dipole is formed from an Au nano-butterfly dipole etched by multiple slots. This structure can simultaneously realize the near-field coupling of tips, the grating coupling, and the hybrid coupling among different media. The coaction of these three couplings can effectively improve the absorptivity in a wide band. The absorption performance of this nano-antenna in a wide band is analyzed by the finite-difference time-domain method. The numerical analyses show that several absorption peaks exist in the absorption characteristic curve of this multi-slot butterfly dipole nano-antenna in the 400-1800 nm band, and the maximum and the average absorptivities are 98.4% and 84.1%, respectively. The absorption performance of the proposed nano-antenna is obviously superior to that of the butterfly dipole nano-antenna. This antenna can keep a stable absorption performance in a wide band under different polarization states and different incident angles of light.