This datasets include the code of Martian crustla fields. Readers could also download it https://github.com/gaojiawei321/Mars_G110_model. Furthermore, the traced magnetic field lines shown in the Figure 4 of the paper are also available in the .mat file The ion pitch angle distribution shown in Figure 3, the magnetic topology index shown in Supplementary Figure 2 are also available here. The wave properties, the distribution of curvature radius of field lines, gyroradius and the adiabatic parameter are all available here