Due　to　a　high　transmission　in　the　infrared　range　as　well　as　the　high　linear　refractive　index　and　nonlinearity,　chalcogenide　glass　was　a　good　candidate　for　mid-infrared　supercontinuum　generation.　Since　the　wavelengths　of　pump　sources　for　pumping　nonlinear　mediums　are　usually　less　than　2　μm,　it　is　valuable　to　study　their　material　dispersion.　Used　four　different　forms　of　equation　to　fit　the　refractive　index　versus　wavelength　curves,　three　different　kinds　of　chalcogenide　glass　was　simulated:　As2S3,　As2Se3　and　Ge3As12Se55,　also　we　got　their　material　dispersion　curves　by　the　former　simulation　results.　Their　zero-dispersion　wavelengths　are　4.8　μm,　7.2　μm,　6.1　μm,　respectively.　While　proved　that　it　is　not　suitable　to　use　refractive　index　data　at　short　wavelength　to　fit　and　simulate　the　trend　at　long　wavelength　for　chalcogenide　glass.　©,　2014,　Chinese　Society　of　Astronautics.　All　right　reserved.