The possibility of using a hollow-core Bragg fiber with cobweb- structured cladding to obtain low-loss transmission in wavelength range 0.65 μm～ 1.55 μm and 200 μm～ 500 μm is proposed and analyzed. The results show that the transmission losses of the hollow-core Bragg fibers with cobweb cladding are far less than the absorption losses of constituent plastics. Thus, using inexpensive plastics, it allows the fibers to meet the needs of transmission longer-distance and higher-bandwidth and to realize the wavelength division multiplexing(WDM).