The invention relates to a kiln head hood top hanging brick which comprises brick bodies and a fireproof block arranged between the two brick bodies. The brick bodies comprise the lower body and the upper body. The left side and the right side of the upper body are provided with fireproof grooves respectively. When the two brick bodies are spliced together, a stopping groove higher than the fireproof block is formed by splicing the two fireproof grooves, and the fireproof block is inserted into the stopping groove. The upper body is composed of an upper part, a middle part and a lower part. A U-shaped groove is formed in the fireproof block. The left side wall and the right side wall of the lower part are provided with protruding strips extending upwards respectively. The fireproof block is arranged above a straight gap formed by two laterally adjacent hanging bricks, so that a kiln head hood top is prevented from being burned out by flames penetrating through the straight gap, a fire clay adhesive mode is replaced, paths of flames are increased through the protruding strips, and the kiln head hood top is further prevented from being burned out by flames. The lateral width of the upper part of the upper body is smaller than the width of the lower part of the upper body. The upper part can be directly hooked and the hanging brick can be hung. When the hanging brick is installed, a sealing block is directly inserted into a sealing groove formed by the adjacent hanging bricks.