Filling interlayer for fireproof door

The utility model relates to the technical field of filling interlayers, in particular to a filling interlayer for a fireproof door, which comprises a framework, mounting grooves are equidistantly arranged on the upper surface of the framework, each mounting groove is rectangular, and two protective parts are movably inserted in each mounting groove. An interlayer main body is arranged between every two protection parts, protection layers are arranged on the upper side and the lower side of each interlayer main body, grooves matched with the interlayer main bodies are formed in the surfaces of the protection parts, a user places every two protection parts in the inner mounting grooves, and therefore the multiple interlayer main bodies form a filling interlayer structure; the two positioning blocks at the bottom end of the connecting frame are movably inserted into the positioning grooves correspondingly, the connecting frame and the flame-retardant layer are fixed to the framework through bolts, the multiple