A novel hybrid type double ribbed surface plasmon waveguide structure is designed, and transmission characteristics at the work wavelength of 1550 nm are simulated and optimized based on the finite element method. The electric field distribution, transmission loss, normalized mode field area, quality factor and gain coefficient of the designed structure are studied. The results show that through the optimal parameter design, the effective mode field area is up to 1.5×10-4λ2, the quality factor is 135, the gain factor is 1286 cm-1, and the loss is small. Compared with the rectangular metal mixed ridge waveguide structure, the designed structure has better light field limited ability and can get better waveguide transmission effect. The designed waveguide structure is an important way to solve photoelectric technology with high speed, miniaturization and integration in the future.