Abstract: Based on the neutronics integral experimental setup at China Institute of Atomic Energy, the leakage neutron spectra from gallium samples were measured by time-of-flight technique with a BC501A scintillation detector. For the benchmark analysis of the neutron evaluated nuclear data of gallium, the leakage neutron spectra were simulated by MCNP 4C code with the ENDF/B-Ⅶ.1, JEFF-3.2 and TENDL-2015 evaluated nuclear data libraries and compared with experimental data and TALYS code calculated results. The results show that the measured data are well reproduced by simulation with the TENDL-2015 library below the 9 MeV. The calculation results of JEFF-3.2 and TENDL-2015 libraries give better agreement with the measured data in the elastic scattering energy region. For the inelastic scattering peak around 12 MeV, JEFF-3.2 library shows a better agreement with the measured data, and TALYS results indicate that the contribution of discrete levels is dominated contribution.