Detachment faults near Mid- Ocean Ridges (MOR) and Oceanic Core Complexes (OCC) develop along the boundaries of slow and ultraslow spreading MOR central rifting, companied with asymmetric oceanic spreading. The formation and evolution of detachment faults originated from intermittent magmatic cycling along the MOR central rifting. The size and location of detachment faults vary with their evolution, and further affects the location of the MOR spreading center. According to the law of offaxis migration of MOR spreading center, this study divides the evolution process of detachment faults and OCCs into six stages. Based on classification above, the global 27 detachment faults are further classified. Currently, most MOR detachment faults are inactive and can be classed as stage VI (such as Logachev Massif and Kane Megamullion), and some of them are still active and belong to the stage of III/IV (such as 13°19′ N, MAR and Mt. Dent detachment faults) and stage V ( such as 13°30' N, MAR and Atlantis Massif detachment faults). During the cycling process of the detachment faults and OCCs from formation to evolution, perishment, and to new formation, periodic magmatism occurred in central rifting. Meanwhile, the MOR spreading center started to migrate from the midline of new volcanic zone (NVZ) to the termination line of detachment faults, and finally to the midline of the reactive new volcanic zone, resulting in the off- axis and axial displacement.