A self-centering inferior vena cava filter, comprising: a filter portion configured to filter thrombi, comprising at least two layers of filter members extending along a central axis of the self-centering inferior vena cava filter, the at least two layers of filter members being adjacent to each other and staggered around the central axis; a support portion configured to prevent the self-centering inferior vena cava filter from tilting, extending outwardly radially from a center point of the self-centering inferior vena cava filter in a direction close to the filter portion and then curling inwardly radially in a direction away from the filter portion , and configured to be supported on a blood vessel wall by point contact; and a retrieval portion connected with at least one of the filter portion and the support portion ; wherein each of the at least two layers of the filter members comprises a plurality of struts extending outwardly radially from the center point, wherein the plurality of struts of the filter members adjacent to each other being staggered around the central axis, and the plurality of struts of the filter member closest to the support portion being staggered with support struts of the support portion ; each of the plurality of struts of the filter member closest to the support portion comprises at least a first segment , a second segment , and a third segment extending sequentially outwardly radially from the center point; the first segment is in a straight-line shape and parallel to the central axis, each of the second segment and the third segment is in a curved-line shape and extends gradually outwardly radially; the radius of curvature of the third segment is greater than that of the second segment ; and smooth transitions between the first segment , the second segment , and the third segment are provided; wherein the second segment curls radially away from the central axis, and the third segment curls radially toward the central axis. a filter portion configured to filter thrombi, comprising at least two layers of filter members extending along a central axis of the self-centering inferior vena cava filter, the at least two layers of filter members being adjacent to each other and staggered around the central axis; a support portion configured to prevent the self-centering inferior vena cava filter from tilting, extending outwardly radially from a center point of the self-centering inferior vena cava filter in a direction close to the filter portion and then curling inwardly radially in a direction away from the filter portion , and configured to be supported on a blood vessel wall by point contact; and a retrieval portion connected with at least one of the filter portion and the support portion ; wherein each of the at least two layers of the filter members comprises a plurality of struts extending outwardly radially from the center point, wherein the plurality of struts of the filter members adjacent to each other being staggered around the central axis, and the plurality of struts of the filter member closest to the support portion being staggered with support struts of the support portion ; each of the plurality of struts of the filter member closest to the support portion comprises at least a first segment , a second segment , and a third segment extending sequentially outwardly radially from the center point; the first segment is in a straight-line shape and parallel to the central axis, each of the second segment and the third segment is in a curved-line shape and extends gradually outwardly radially; the radius of curvature of the third segment is greater than that of the second segment ; and smooth transitions between the first segment , the second segment , and the third segment are provided; wherein the second segment curls radially away from the central axis, and the third segment curls radially toward the central axis. <EOS>