The theory of dust cloud occlusion believes that the solar system at this moment is running into an interstellar dust belt, and the dense interstellar dust cloud blocks the starlight shining on the earth in all directions, which leads to the disappearance of stars. This inference satisfies the above conditions, but it also has unexplainable fatal flaws. If all the above-mentioned stars are to be blocked, the dust cloud must be very large and thick, then it must be observable by humans. But humans have not been aware of the existence of any interstellar dust clouds of a certain size around the solar system.