A new type of metal-insulator-semiconductor (MIS) hybrid surface plasmonstructure is proposed. It is verified that the structure has obvious TM mode band gap in the normalized frequency range of (0.243～0.271)a/λ. Line defect is formed by removing and changing the radius of air holes in the two-dimensional photonic crystal layer, and hybrid waveguide structure 1 and 2 are constituted. Analysis shows that the photon energy whose frequency is located in the bandgap is well confined in the low index layer and can only be transmitted along the line defect. When the incident wavelength is 1550 nm, the transmission distances of two waveguides are 18.41 μm, 15.70 μm, the group velocity extreme values are 0.186c, 0.166c, the quality factors are 384.74, 1042.50, respectively. The waveguide can control the transmission path of low refractive index layer surface plasmon polariton (SPP) through the line defect of photonic crystal layer. It provides an effective theoretical basis for the research of waveguide devices.