CsI-LiCl and CsI-LiCl∶Na eutectic scintillators were successfully grown in a vacuum-sealed quartz crucible by vertical Bridgman method. The periodic lamellar microstructure of the crystal was observed by SEM with the CsI phase of 5 μm thickness. The X-ray excitation luminescence spectra show that the luminescence of CsI-LiCl and CsI-LiCl∶Na eutectic is mainly attributed to the oxygen induced defects luminescence. And the STE luminescence of pure CsI is observed in the CsI-LiCl eutectic. Full energy peak is observed in the α particle excited multi-channel energy spectrum of CsI-LiCl eutectic, which indicates that the eutectic has potential thermal neutron detection ability.