Abstract: See-saw activity is one type of crustal wavy movement.This activity has occured from west to east and even from land to sea across the Chinese continent during various geological time.It takes the uplifts(or intrabasinal sub-uplifts)and the fault zones between platform and basin as the axis in its see-saw rocking turn,controlling the growth and development of the basin and the distribution of oil and gas.This article makes a preliminary approach to the relationship between the major petroliferous basins and the see-saw activity on the basis of the concept of crustal wavy movement and mosaic tectonics.The effect of this see-saw activity upon the formation of oil and gas deposits is also discusssed.