The invention discloses a quasi-surface plasma combined type slit wave guide and an application thereof. The quasi-surface plasma combined type slit wave guide has a periodic micro-structure with sub-wavelength scale and a periodic Bragg structure with wavelength scale. The multi-scale combined type slit wave guide simultaneously has characteristics of artificial micro-structural meta-material and guide wave and band gap properties similar to those of a photonic crystal. The properties of the local effective medium of the combined wave guide can be controlled through the micro-structure with the sub-wavelength scale; the wave guide body can support the micro-wave band gap and a defect mode similar to a photonic crystal energy band. The micro-wave band gap and defect mode can respectively realize band-reject filter and band-pass filter. The quasi-surface plasma combined type slit wave guide combines the dispersion relation of the quasi-surface plasma wave guide and a Bloch theory to provide the band gap figure of the combined type wave guide in a geometrical parameter space.