The invention discloses an automatic replacer of a tuyere small sleeve. The automatic replacer comprises a frame, a supporting bench, a push-pull rod and a hook, the supporting bench is positioned on the frame, an elevating driving mechanism is arranged between the supporting bench and the frame, the push-pull rod is positioned on the supporting bench, the push-pull rod is connected with an advance and retreat driving cylinder horizontally arranged on the supporting bench, the hook is hinged to the push-pull rod, the push-pull rod is provided with a hook jacking cylinder, and the hook jacking cylinder is connected with the hook and is used for driving the hook to rotate up and down relative to the push-pull rod. The automatic replacer of the tuyere small sleeve allows the hook to rotate up and down, so tuyere small sleeve can be conveniently pulled out or installed.