An absorbable blood vessel stent comprising a proximal end, a distal end and a tubular pattern structure that is expandable and is formed between the proximal end and the distal end, wherein the pattern structure comprises a plurality of support struts (2, 3) and connection bridges, each connection bridge or support strut (2, 3) having a straight line segment, a U-shaped segment or a S-shaped segment, wherein at least one through slot is provided on first and second support struts (2, 3), wherein the pattern structure comprises annular wavy bands with adjacent bands being coupled to one another by connection bridges, each annular wavy band comprising a plurality of arched support pieces connected adjacent one another at wave peak segments and at wave valley segments, such that a first support strut and a second support strut are connected by a wave peak segment, characterized in that first and second through slots (5, 6) are provided in a central portion of the respective first and second struts (2, 3), where either end of the first and second slots (5, 6) are close to positions of the wave peak segment and the wave valley segment, wherein each of the first slot and the second slot divides the first strut and respectively the second strut into a first branch and a second branch and a first neck portion is formed at a position where the first branch is close to the wave peak segment, the first neck portion being the position of minimum width of the first branch, and wherein a first broad portion is formed at the other end of the first branch which is the position of maximum width on the first branch and wherein the width of the first branch extending from the first neck portion to the first broad portion gradually changes, and wherein the second branch has a second broad portion at a position opposite the first neck portion, the second broad portion being the position of maximum width on the second branch, and wherein a second neck portion defining the position of minimum width on the second branch is formed at a position opposite the first broad portion of the first branch and wherein the width of the second branch changes gradually from the second neck portion to the second broad portion. wherein the pattern structure comprises annular wavy bands with adjacent bands being coupled to one another by connection bridges, each annular wavy band comprising a plurality of arched support pieces connected adjacent one another at wave peak segments and at wave valley segments, such that a first support strut and a second support strut are connected by a wave peak segment, characterized in that first and second through slots (5, 6) are provided in a central portion of the respective first and second struts (2, 3), where either end of the first and second slots (5, 6) are close to positions of the wave peak segment and the wave valley segment, wherein each of the first slot and the second slot divides the first strut and respectively the second strut into a first branch and a second branch and a first neck portion is formed at a position where the first branch is close to the wave peak segment, the first neck portion being the position of minimum width of the first branch, and wherein a first broad portion is formed at the other end of the first branch which is the position of maximum width on the first branch and wherein the width of the first branch extending from the first neck portion to the first broad portion gradually changes, and wherein the second branch has a second broad portion at a position opposite the first neck portion, the second broad portion being the position of maximum width on the second branch, and wherein a second neck portion defining the position of minimum width on the second branch is formed at a position opposite the first broad portion of the first branch and wherein the width of the second branch changes gradually from the second neck portion to the second broad portion.