Abstract:According to the distribution of lithospheric plates and their known evolution, the author analyzes the basic characteristics of plate motion as well as a variety of geodynamic mechanisms proposed by predecessors, specifically mantle convection. The author proposes that the earth dynamics of crustal movement comes from "unsynchronized action" caused by the "pole-fleeing" of the earth’s rotation and the change of the radius of gyration, and that the earth dynamics are also affected by the inherent laws of the rigid lithospheric plate, such as stress balance, inertia and elasticity. In addition, the role of regular tidal and the occasional meteorites are additional stress factors on plate movement.