My home belongs to floor heating. Can laying a layer of insulation board on the ground and then laying tiles play a role in insulation?

Yes, that's what floor heating is all about. First, put the foam board or plastic board on the reflective paper. There are non-woven fabrics and kraft paper, which are not easy to fix. Then put PB or pex or pe-rt on the barbed wire. If the ground elevation is not enough, use PE film, that is, thin foam board and reflective paper are stuck together. Large real estate developers will basically use foamed cement and steel wire cards to fix the pipes on the floor. The practice is to make an insulation layer under the reflective paper, and then make a steel wire mesh, and paste tiles when backfilling the pipeline. This is the standard method.