The laser scattering properties of the target, which is characterized by the laser radar cross section (LRCS), are the theoretical basis of the target detection and recognition of a lidar system, and play an important role in the design and evaluation of a lidar system. We calculated the LRCS of the vehicle based on the in-field measurement and numerical simulation. The experimental results demonstrate that the trend of simulated data of the vehicle and the corresponding experimental data is qualitatively similar, but there is a big difference in absolute value. Based on this, we can optimize the approaches for researching the laser scattering properties of the target.