The invention discloses a tapered-straight thread die head with an automatic cutter withdrawal function. The tapered-straight thread die head is applicable to a threading machine, and comprises a hinge disc, a tray, a curve disc and a rotary disc, wherein a sliding block platform is arranged on the hinge disc; a connector platform is arranged on the rotary disc; and through an upper-level control structure, the two platforms are switched between the static sate and relative motion, thereby fulfilling the purpose of automatic cutter withdrawal. The tapered-straight thread die head disclosed by the invention has the beneficial effects that the impact of workpiece jumping on the machining precision can be overcome; the tapered-straight thread automatic cutter withdrawal function and the precise machining can be achieved; the tapered-straight thread die head can be controlled to achieve the automatic cutter withdrawal at any length; the application range of the die head can be expanded; and the technical barriers of the threading machine in the field of automated application can be broken through.