The disclosure provides a chassis component of a railway vehicle, and a railway vehicle, the chassis including two lower boundary beams, the two lower boundary beams being provided at an interval; and a cross beam component, the cross beam component being provided between the two lower boundary beams, wherein there are a plurality of cross beam components, and the plurality of cross beam components are provided along a length direction of each of the lower boundary beams at an interval, wherein at least one cross beam component includes a first cross beam and a second cross beam provided below the first cross beam in a height direction of the each of the lower boundary beams, the first cross beam and the second cross beam form a mounting cavity, and a part of a floor of a railway vehicle penetrates into the mounting cavity.