Fixed-length pre-embedding tool for double-end stud

The invention discloses a fixed-length pre-embedding tool for a double-end stud. The fixed-length pre-embedding tool comprises a tool body, the top of the tool body is provided with a pneumatic tool connector capable of being matched with a pneumatic tool, the bottom of the tool body is provided with a containing cavity capable of containing one end of the double-end stud, internal threads capable of being matched with external threads of the double-end stud are arranged on the side wall of the containing cavity, a limiting part used for limiting the double-end stud is arranged on the top wall of the containing cavity, a positioning base face is arranged at the bottom of the tool body, and the distance L between the positioning base face and the limiting part is the specific length of the pre-embedded stretching-out portion of the double-end stud. The double-end stud can be quickly screwed into a pre-embedding hole in a fixed-length installation mode, fixed-length installation of the double-end stud is achiev