Disclosed are a stepped jacket for packaging a puncture outfit and a manufacturing method therefor, the stepped jacket (100) comprising a proximal opening (140) defined by a horizontal wall (141), and the stepped jacket further comprising a closed distal end and a seamless housing (121) extending between the horizontal wall and the closed distal end, wherein a seamless cavity (120) comprising an end opening is defined by the seamless housing; the seamless housing can be mainly divided into a first scanning wall (151), a transition scanning wall (161), and a second scanning wall (171) from a proximal end to a distal end thereof; a body cavity (150) is defined by the first scanning wall, a transition cavity (160) is defined by the transition scanning wall, and an extension cavity (170) is defined by the second scanning wall; the body cavity, the transition cavity and the extension cavity communicate with each other to form the main part of the seamless cavity; the direction substantially perpendicular to the ho
