The invention discloses a full-automatic safety traffic cone stacking and recovering device. The device comprises a base and a U-shaped conveying unit arranged at the top of the base, wherein a connecting rod is arranged at one end of the base, connecting pieces are arranged at the top of the connecting rod, double-lug plates are rotationally connected to the connecting pieces, a transverse movinglinear guide rail is arranged on the double-lug plates, a transverse moving module sliding block is arranged on the transverse moving linear guide rail, a transverse moving driving motor is arrangedat one end of the transverse moving linear guide rail, a connecting plate is arranged at the bottom of the connecting rod, a bottom sliding rail is horizontally arranged on the connecting plate, and abottom sliding block is arranged on the bottom sliding rail; a lifting module is connected to the transverse moving module sliding block, a lift sliding rail is arranged on a lifting sliding rail, alift sliding block is arranged on the lift sliding rail, a rotary mechanical arm is arranged on the lift sliding block, and a holding clamp is arranged at the tail end of the rotary mechanical arm. The invention further discloses a full-automatic safety traffic cone stacking and recovering method of the device. The device and method can remarkably improve the stacking efficiency or recycling efficiency of safety traffic cones.