Based on the blind hole method, the residual stress of the spherical weld toe of three kinds of welded hollow spherical joints was tested.The strain release factors of the strain gauge selected in this test is calculated according to the conventional model and the Kirsch theoretical solution. According to the Scara-Mangas empirical formula, the calculated spherical radial and circumferential welding residual stresses are plastically modified, and the residual stress distribution of the spherical welding is finally obtained. The influence of welding residual stress on joint fatigue in engineering field is discussed.