An interspinous stabilizer (2), comprising: an interspinous spacer (1), comprising a central support (100), having a first direction (13) and a second direction (14) opposite to each other, and an upper side (11) and a lower side (12) perpendicular to the first direction and the second direction； an upper side wing (110) is on the first direction and extending from the upper side of the central support； a lower side wing (111) is on the first direction and extending from the lower side of the central support； an upper protrusion (120) is on the second direction and extending from the upper side of the central support； a lower protrusion (121) is on the second direction and extending from the lower side of the central support； at least one perforation (140), the perforation traversing through the first direction to the second direction of the central support.
