Abstract: This paper discusses the origin and formation courses of the earth by beginning from material origin, and divided the earthforming stage into five periods such as polymerization, melting, crystallization, impact and expansion, shape, based on which proposes the original motivity of crustal movement, that is, expansion and compaction mechanism. By using the mechanism, the expressions of the earth and crustal movement such as continental drift, plate collision, ocean-floor spreading, magnetic inversion, non-asymmetric expansion and basinal subsidence, etc. are analyzed macroscopically.

Key words: the earth origin, crustal movement, motivity mechanism