An orthodontic bracket setup, comprising: a bracket body and an elongated nail body, wherein the bracket body is provided with a main slot, a reserved hole is provided at a side of the bracket body, an inner diameter of the reserved hole ranges from 0.2 to 1.6 mm, an inner wall of the reserved hole is provided with connecting internal screw threads, wherein the nail body has a cross-sectional area ranging from 0.06 mm 2 to 2.5 mm 2, and a length ranging from 0.8 mm to 4.5 mm, a front end of the nail body is a first fixing end adapted to lock the archwire, a rear end thereof is a first screwing end, the first fixing end is provided with connecting external screw threads, and an external diameter of the connecting external screv threads ranges from 0.2 mm to 1.6 mm, the first screwing end is provided with a first force applying surface on at least an end position thereof a detaching handle, wherein a front end of the detaching handle is a second fixing end, a rear end thereof is a second screwing end, the second fixing end is adapted to be connected to the first screwing end, and a joint therebetween has a detaching portion, the strength of the detaching portion is less than the strength of the nail body and the strength of a main segment of the detaching handle, and the second screwing end is provided with a second force applying surface; wherein the detaching portion is an enclosing wall extending outwardly from an outer wall of the second fixing end, an inner portion of the second fixing end is hollow to form a concave portion, and the first screwing end is adapted to be located in the concave portion and enclosed by the enclosing wall. a bracket body and an elongated nail body, wherein the bracket body is provided with a main slot, a reserved hole is provided at a side of the bracket body, an inner diameter of the reserved hole ranges from 0.2 to 1.6 mm, an inner wall of the reserved hole is provided with connecting internal screw threads, wherein the nail body has a cross-sectional area ranging from 0.06 mm 2 to 2.5 mm 2, and a length ranging from 0.8 mm to 4.5 mm, a front end of the nail body is a first fixing end adapted to lock the archwire, a rear end thereof is a first screwing end, the first fixing end is provided with connecting external screw threads, and an external diameter of the connecting external screv threads ranges from 0.2 mm to 1.6 mm, the first screwing end is provided with a first force applying surface on at least an end position thereof a detaching handle, wherein a front end of the detaching handle is a second fixing end, a rear end thereof is a second screwing end, the second fixing end is adapted to be connected to the first screwing end, and a joint therebetween has a detaching portion, the strength of the detaching portion is less than the strength of the nail body and the strength of a main segment of the detaching handle, and the second screwing end is provided with a second force applying surface; wherein the detaching portion is an enclosing wall extending outwardly from an outer wall of the second fixing end, an inner portion of the second fixing end is hollow to form a concave portion, and the first screwing end is adapted to be located in the concave portion and enclosed by the enclosing wall.