Earth interior material science arose at the historic moment in order to resolve the difficult problem that the integration of geophysical and geochemical studys results could not be done.The earth interior material science is such a subject that not only studies physical and chemical properties of all material substanse in earth interior, but also studies the structure and dynamics of earth interior from materials point of view.With the development of this subject, the composition explanations will be provided to the observing results and analogue computing results about earth interior. Finally, a unitary knowledge about compositions, structure and dynamics of earth interior will form, and an earth interior model will be established to be suitable for various subjects.