According to the principle of thermal expansion and cold shrinking, it is found that there is a magic one-to-one correspondence between the existing eight ancient plates of the earth and the eight planets of the solar system. It is found with further studying that there is a one-to-one correspondence between the nine celestial bodies of the solar system with the sun as the core and the nine ancient plates splitting from the unique prehistoric supercontinent. Therefore, in order to restore the prehistoric unique supercontinent, it is not to simply pile up the existing residual dominant ancient plates, but to restore the hidden ancient plate sunk into the ocean floor and take it as the core to restore the prehistoric unique supercontinent. The unique prehistoric supercontinent reconstructed by such a jigsaw recovery is similar to the shape of the solar system or an egg, presenting with a clear core and circle structure. The core ancient plate, which is recovered from the occult ancient plate on the ocean floor, determines the uniqueness, irreversibility and unrepeatability of the prehistoric supercontinent. The sudden extinction of the dinosaur family at the end of the cretaceous about 66 million years ago provides the easiest reasonable guess as to the time point when the Earth's unique supercontinent broke-up. The clam shape distribution of the geological age on the Northwestern Pacific Ocean floor gives us a hint meaning for the symbolization of the black hole in the universe which always dominant the spiral galaxy as the core of it.