We design a novel all-normal flat near-zero dispersion chalcogenide photonic crystal fiber (PCF) for generating midinfrared (MIR) supercontinuum (SC).The proposed PCF with a core made of As2Se3 glass and uniform air holes in the cladding is selectively filled with As2S5 glass.By carefully engineering the PCF with an all-normal flat near-zero dispersion profile,the anomalous-dispersion soliton effect is reduced,thus enabling broadband highly coherent SC to be generated.We also investigate the influence of the pulse parameters on the SC generation.Broadband SC covering 1.4 μm-10 μm with perfect coherence is achieved by pumping the proposed 3-cm-long PCF with 3-tm 100-fs pulses.The results provide a potential all-fiber realization of the broadband coherent MIR-SC.