Numerical simulations were performed on the photonic band gap(PBG) properties of the photonic crystal fibers(PCFs) possessing a clad with the cladding holes triangle-lattice distributed and a round fiber core using the full-vector plane-wave expansion method. Through the comparative analysis on the relationship of the PBG property and the structure parameters(cladding hole diameter d_clh, cladding hole pitch Λ and cladding hole filling ration f) between traditional(air-silica) and all-solid-state(nonair-silica) PCFs, a design of an all-solid-state PCF was given out which operates at the communication wavelength of 1 550 nm with the parameters d_clh=1.0 μm, Λ=2.0 μm and f=0.23 at the conditions of fiber core diameter d_co=5.3 μm and cladding hole material′s refractive index n_clh=1.65. Further numerical simulation shows that this resulting PCF has a gap width up to 43 nm.