Mid-infrared random laser is obtained by Fe2+∶ZnSe powders.The Fe2+ doped ZnSe polycrystal are prepared by vapor phase thermal diffusion method,and the bulk is mechanically grinded into micron-sized powders (10~50 μm).The X ray diffraction (XRD) results indicate that the powders have the same zinc-blende structure as the ZnSe bulk,and the Fe impurity does not change the crystal structure of ZnSe substrate.The PL spectroscopic characterization and temporal profile are studied by a self-made fluorescence testing system under 2.94 μm excitation of Er:YAG laser at room temperature.As the pump energy increases,the intensity of spectrum is increased abruptly,the linewidth is reduced from 500 nm to 50 nm and the pulse width is decreased from 270 ns to 50 ns.When the pump energy is higher than 2 mJ/pulse,typical random laser emissions centering at 4.45 μm are observed.This mid infrared random laser has a good application prospect in the fields of infrared marking,optical communication and molecular spectrum measurement.