section 2 as a connecting point the annuloplasty ring is spread along the circumferential direction thereof to form a straight and flat tubular helical structure and the tubular helical structure may have an outer diameter of 1 3 mm and consistent pitch a sheet material strip for forming the helical structure has different widths at different portions and the adopted sheet material strip usually may have a thickness of 0 1 0 6 mm and is formed through such as laser cutting or stamping as illustrated in fig4 the sheet material strip has a bigger width at the middle part and a smaller width at two ends the change between the two different widths is gradually transitional through adjusting the width of the sheet material strip various ring sections of the annuloplasty ring are adjusted to be beneficial to coordinate movement of the annuloplasty ring with the systolic and diastolic cardiac cycle as illustrated in fig2 the posterior ring section 2 the left ring section 3 and the right ring section 4 are flexible ring sections and have the smallest width of the sheet material strip the anterior ring section 1 compared with the posterior ring section 2 the left ring section 3 and the right ring section 4 is a rigid ring section and has the largest width of the sheet material strip and the width of the sheet material strip of the connecting section 5 lies between the widths of the sheet material strips of the two ring sections connected by the connecting section 5 fig3 is a cross section diagram of the annuloplasty ring which uses a tubular helical structure formed.