The invention relates to an improving method of a spring chuck for processing bearing sleeves, which is characterized in that a transition piece (1) is connected with the external circumference at the end of an evenly divided groove of a spring chuck (2) to form an integrated bearing sleeve clamp; two ends of the external diameter of the transition piece are chamfered, and a connecting hole and apositioning hole are arranged at two ends in the radial direction of the transition piece; the internal diameter of the connecting hole is less than or equal to the internal diameter of the positioning hole, the internal diameter of a through hole is less than the internal diameter of the connecting hole, and the axial width of the connecting hole is less than the width of the external circumference at the end of the evenly divided groove of the spring chuck; the connecting hole is in interference fit with the external circumference at the end of the evenly divided groove of the spring chuck,the spring chuck is put into the connecting hole of the transition piece and is welded along a cycle of the external end surface of the spring chuck, and the position of the evenly divided groove of the spring chuck is not welded; the welded integrated bearing sleeve clamp mills a telescopic groove, the groove direction and the width of which are the same with the groove direction and the width of the evenly divided groove of the spring chuck, on the external end surface of the positioning hole, and then, the internal diameter and the internal end surface of the positioning hole are finely bored; and the positioning hole clamps other parts of bearing sleeves. The invention widens the application range and has the characteristics of good service performance, simple structure and easy processing and manufacture.