Abstract: Quality of weld shape of the SSAW pipe is directly responsible for mechanical properties of the weld joint in service,interior quality of the weld and the cost for anti-corrosion coating, and also reflects whether the welding parameters are determined appropriately. Described here in the paper are the geometric parameters of weld shape（i.e.,the selective parameters and the optional parameters）according to different types,focusing on discussion of such parameters as weld reinforcement, weld width,depth of fusion,fusion ratio,coincidence,excessive angle, inlaying amount and weld measures, and the influence on welding quality thereby.