Tool transposition device for lathe tailstock

The invention relates to a tool transposition device for a lathe tailstock. The tool transposition device comprises a tailstock connecting seat and a rotating body, wherein the tailstock connecting seat is used for being fixed on the lathe tailstock, and the rotating body is rotatably and adjustably assembled on the tailstock connecting seat; a cutter fixing hole is formed in the rotating body, afastening screw through hole is formed in the hole bottom wall of the cutter fixing hole, and a jackscrew hole is formed in the hole side wall; and the axis of the jackscrew hole is obliquely arrangedrelative to the axis of the cutter fixing hole, and the inner end of the jackscrew hole faces the bottom of the cutter fixing hole. The jackscrew hole which is obliquely arranged is adopted, so thatthe axial force of a cutter mounting sleeve is increased, larger friction is formed between the cutter mounting sleeve and a stopping surface on the rotating body, and the cutter is better prevented from loosening due to overla