Abstract Based on the characteristics analysis of active oceanic faults, we find oceanic crust growth, symmetrical structure, fold structure and volcanic structure in active oceanic crust fault. Oceanic crust faults not only release heat, but also create pushing forces that grow new oceanic crust and leave traces of evolution on the oceanic crust topography. The growth of oceanic crust inside the fault promotes the relative movement of oceanic crust on both sides of the fault, and the comprehensive influence of the activities of many oceanic crust faults causes the relative movement of oceanic crust blocks. The mid-oceanic ridge is the product of oceanic crust growth and the transform fault region is the boundary zone of current relative movement of oceanic crust blocks.