根据目前地球物理、地球化学、地质学及行星地质等研究的成果，本文讨论了地球演化的内外因素，并提出了一种新的地球结构模式。笔者认为，地球是一个相对开放的系统，其内外层圈之间的作用过程存在密切联系，地球层圈的分化融合作用决定了地球的演化及变动过程。最后，通过对软流层分化融合作用的分析，提出了一种陆缘扩张盆地演化的新模式，并对第二次造山及软硬碰撞等问题做了概略的讨论。 According to the current achievements in geophysics, geochemistry, geology and planetary geology, this paper discusses the internal and external factors of the evolution of the Earth and proposes a new model of the Earth’s structure. The author believes that the Earth is a relatively open system, the inner and outer layers of the role of the process is closely linked, the integration of the Earth’s lair determines the evolution and evolution of the Earth’s process. Finally, a new model for the evolution of the marginal expansion basin is proposed by analyzing the convergence and divergence of the asthenosphere, and the second such problems as the orogenic and soft-hard collisions are briefly discussed.