The invention relates to a mechanized method for installing a resin anchor rod, belonging to the supporting field of roads and tunnels. The mechanized method is characterized in that the resin anchoring agent adopts the sausage-type tandem packing; the installation of the resin anchoring agent is completed by an installing tool of the resin anchoring agent arranged on a trolley rock-drilling machine; the installation of the resin anchor rod is completed by an installing connector of the resin anchor rod arranged on the other large arm of a trolley; in the process that the resin anchor rod is fed into the bottom of an anchor rod hole, the trolley rock-drilling machine rotates to drive the connector of the resin anchor rod and the resin anchor rod to rotate, and the resin anchor agent is uniformly stirred; then, the trolley stops rotating, the resin anchor agent is solidified, and the rod body of the anchor rod is fixed in the hole; a trolley rotating mechanism rotates continuously, a connecting pin of the resin anchor rod is cut through, and an anchor nut is rotated continuously to compress an anchor supporting plate to the rock cliff. The method not only can ensure the safety of the installation personnel of the anchor rod, but also can improve the working efficiency of the installation of the resin anchor rod greatly.