Objective To explore the visualization effect of different walking fibers and anatomical positions of the basal nucleus in the postcentral gyrus based on the diffusion tensor imaging (DTI) fiber bundle of the precentral gyrus and internal capsule reconstruction model.  Methods  A set of diffusion tensor volume (DTV) data was used to visualize and export a mesh model by a 3DSlicense 5. 6. 2 software. The basal nucleus were reconstructed by 3DSlicense through T1W1 data from the same scan, and exported the mesh model, and thus imported the above model into DTIANALYSIS 1.51 software for visualization. By adjusting the RGB component threshold, the fiber bundles were screened to obtain fiber bundles that mainly run left and right, front and back, and up and down. The anatomical relationship between the fiber bundles and the basal nucleus was observed.  Results  The fiber bundles originating from the precentral gyrus were mainly distributed in the inner and lower parts, and run above and outside the basal nucleus; The fiber bundles that mainly run forward and backward are distributed on the outer side and run on the outer side of the basal nucleus; The fiber bundles that mainly run up and down were distributed in the upper and middle parts of the precentral gyrus, with some fibers running towards the hypothalamus. They intersect in the corpus callosum and ventral pons, and run along the posterior part of the space between the lentiform nucleus and the dorsal thalamus.   Conclusion  Based on the RGB components in DTI, fibers with different walking directions in the precentral gyrus can be screened to display their anatomical position relationship with the basal ganglia.