Research conclusions: On the rigid subgrade and soil subgrade, it is not necessary to install the HGT layer below supporting structure. When designing the slab ballastless track on soil subgrade, the number of expansion joints of supporting structure should be cut down as fully as possible, and the expansion joints between track slabs and supporting structure do not be aligned. When designing the slab ballastless track on rigid subgrade, determining whether the expansion joins is even or not. Under the same conditions, there is very low change of stress of each layer of the slab ballastless track when the thickness of top-layer of subgrade bed is increased from 400 mm to 700 mm on soil subgrade.