All-solid hybrid photonic crystal fiber with micro-structured core is proposed. The micro-structured core is consisted of pure silica and a high refractive index germanium-doped rod. Using the full-vector finite-element method, the fiber′s guiding mechanism, mode field, confinement loss and dispersion are investigated. Simulation results demonstrate that with the increment of central high refractive index rod′s diameter from 0 μm to less than cladding high-index rod, the fundamental model′s effective index moves up from closing to the bandgap′s lower boundary. Furthermore, the guiding mechanism is transformed from bandgap effect into hybrid mechanism and the confinement loss is reduced. In the short wavelength, the guiding mechanism is dominated by the totally international reflection mechanism, the bandgap edge′s influence on loss reduces and the loss decreases monotonically with the decrement of wavelength. But in the long wavelength, light is guided by the bandgap effect and the loss curve moves down integrally. By adjusting the radius of the central high refractive index rod, zero dispersion wavelength of the fiber can be tailored flexibly. When the radius of the central rod is set to 0.5 μm, the zero dispersion wavelength shifts to shorter wavelength, about 30 nm away from the original value. When the radius is 1.2 μm, the zero dispersion wavelength can be shifted to longer wavelength, about 230 nm away. The tunable band-width is up to 260 nm.