The novel multipoint forming technology based on Hydro-forming processing was developed, and the drive mode was discussed. Die is replaced by liquid, and punch is formed by adjusting the multipoint fundamental elements. Finally through controlling the fundamental elements, the height of a serial of discrete, regularly-arranged fundamental elements is adjusted, and by using the punch pad, the accuracy of sheet metal surface contour is improved in multipoint forming technology. Then, the hydro-forming set was developed, and experimented. It provides a new efficient dieless forming method for the digital flexible forming of sheet metal.