The melting points, density, surface tension, viscosity and conductivity of [1ChCl:2EG]/CrCl3?6H2O deep eutectic solvents (DESs) ionic liquids as a function of temperatures and concentration of CrCl3?6H2O had been studied, respectively. The results showed that [1ChCl:2EG]/CrCl3?6H2O DESs have the lowest melting points (211 K), indicating it has wider liquid range at low temperature. It shows a good linear relationship between the density and temperature, with the temperature increasing, the density increased slightly. The surface tension lower than water but higher than traditional organic solvent and increases with the concentration of the CrCl3?6H2O. As temperature increases from 293 K to 343 K, the viscosity of [1ChCl:2EG]/CrCl3?6H2O DESs decreases significantly, but the conductivity increases obviously, and the DESs have the minimum viscosity and the maximum conductivity at the concentration of 0.3 mol/L CrCl3?6H2O. The CrCl3?6H2O and [1ChCl:2EG]/(0.3 mol/L) CrCl3?6H2O DES were decomposed into CRO3 at 923 K, and could maintain stable performance below 383 K.