Abstract: The mechanical properties of Al-alloy 5A02 and its welded joint of CO₂ laser welding and TIG welding were studied. And rolling -orientation and rolling -uprightness orientation mechanical properties were measured. In addition, series load experiments were used to study properties of weld and base metal. This study considered that material anisotropy affects welded-joint mechanical properties, which is relate to each area materials mechanical properties of welded joint,will provide the theoretical bases for investigation of welded joint, as well as provide the local mechanical properties experimental data for crash simulation of Al-alloy automobile components.