TPU floor board and preparation method thereof

The invention discloses a TPU floor board and a preparation method thereof. A TPU material is adopted for replacing a traditional PVC material, a TPU film is selected as a wearing layer, the TPU filmhas preferable wear resistance, the softening point of the TPU floor board is relatively low, the required processing temperature is correspondingly decreased, and the production energy consumption isreduced; moreover, due to the fact that the floor board does not contain chlorine at all, a great deal of smoke cannot be generated during combustion, the pollution to the environment and human bodies is reduced, and the TPU floor board is environmentally friendly; moreover, the TPU floor board is excellent in low temperature resistance, so that the TPU floor board can be used in occasions with relatively low temperature and relatively large environmental temperature change; moreover, the TPU floor board is relatively soft in material, so that the TPU floor board has preferable flatness and lower thermal buckling perf