Abstract: Surface plasmon polaritons (SPPs) directional excitation is the basis for the development of on-chip integrated photonic systems. And SPPs directional excitation based on the catenary metasurface is a hot and frontier field in recent years, however, the SPPs directional excitation with linearly polarized light is less than that of circularly polarized light. In this paper, we design a catenary nanoparticle metasurface to realize the SPPs directional excitation with linearly polarized light. The spectral extinction ratio curve and electric field distribution under the incident of x-polarized light are calculated with the finite difference time domain. The physical mechanism of SPPs directional excitation is explained according to the multi-level scattering theory and the Huygens-Fresnel principle. The simulation results show that the SPPs directional excitation with linearly polarized light based on the catenary nanoparticle metasurface is effective, and the peak extinction ratio is up to 27 dB (corresponding to the incident wavelength of 820 nm), and the bandwidth above 10 dB is about 47 nm (798 nm~845 nm). Therefore, these results are helpful for the research and development of the catenary multifunctional devices.