With the development of computer and network, digital designing and manufacturing technology is coming, which is based on the transmission of digital quantity. In the mode, digital model of the whole machine is the foundation of all. The practice in compromises at home and abroad proved the success of the new technology. Digital designing and manufacturing of aviation sheet metal is very important and it's different from other parts. In SAC, digital designing and manufacturing of the sheet metal tooling has been put into effect, but there're many things to do.