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The equation of state (EOS) of Cr3C2 at high pressure is studied by the synchrotron radiation x-ray diffraction (XRD) in a diamond anvil cell (DAC) at ambient temperature,and density functional theory (DFT).The XRD analysis shows that the orthorhombic structure is maintained to a maximum pressure of 44.5 GPa.The XRD data show that the bulk modulus is K0 =292(18) GPa with K’0 =3.25(0.85).In addition,the high-pressure compression behavior of Cr3C2 is studied by first principles calculations.The obtained bulk modulus of Cr3C2 is 323 (1) GPa.