First of all,Ge₁₅Sb₂₀S 65 and Ge₂₅Sb₅Se₇₀ bulk chalcogenide glasses with different sizes were prepared and their physical,thermal and optical properties are discussed in detail.A novel coextrusion method is adopted to fabricate the fiber perfor m based on the stacked billet of multi-material.Then,the preform is jacked wit h a high strength and high temperature polymer.After that,the preform is drawn into fiber with a specialized fiber drawing tower.The well-controlled cross-section of the fiber with unifor m and clear structure is verified by an optical microscope after a well polishing process.Fourier tr ansform infrared spectrometer is performed to determine the optical loss.The low est optical loss of the fiber is 2.63dB/m at wavelength of 4.8μm.The infrared fiber field will be benefited very much by this novel fabrication approach.