The invention discloses a hot forging manipulator arm. The hot forging manipulator arm structurally comprises a work box, a first heat dissipation net, an access door, a base, a first rotating shaft motor, a component bin, an access cover, a stretchable motor bin, a second heat dissipation net, a stretchable arm, turnbuckles, a clamp, a bin shell, a supporting rod, a second rotating shaft motor, agear, a crawler belt, an electric wire, a rotating shaft and a ring. The hot forging manipulator arm is comprehensive in overall design, all the components are necessary, the design and manufacturingcost is reasonably arranged in place, the overall installation steps are not troublesome and simple, and the hot forging manipulator arm is high in working efficiency and high in practicability and is a working mechanical arm very suitable for hot forging.