Aluminum alloy is the main structural material of high-speed craft. Aluminum alloy could be designed as more reasonable structural, decreasing weight and increasing structural strength. Our company researches the light gate crane and other products independently, that are designed by the 7 series high strength aluminum alloy, therefore, the shipbuilding procedure is faced with a significant transition. The chioce of suitable welding method and welding procedure can effectively control aluminium alloy welding deformation and welding joint strength, our company’s engineering law department has also developed such a high-tech tooling as welding argon protection device and welding environment wind direction control box. We have done a number of welding tests on joint design, welding procedure parameters and so on. After generations of efforts, there are rich data and experience accumulated. After the appearance molding and physical and chemical test, the mechanical compliance with the standard is achieved, and compiled accurate 7 series of high strength aluminum alloy PWPS, forming a formal welding test report (WPQR). A specific field welding procedure is developed, formore, that will form the procedure criteria.