The utility model discloses a special drum device for construction of a dam rubber water stopping belt. The device comprises a drum used for reeling the rubber water stopping belt and a support fixed on a construction die plate of a dam, wherein the drum is rotatably mounted on the support; two protection wheel discs are axially arranged at interval on the upper edge of the drum; and an accommodating groove for accommodating the rubber water stopping belt is formed between the two protection wheel discs. The special drum device has the advantages that the device is convenient to use, labor-saving, high in construction efficiency and capable of protecting the rubber water stopping belt and meeting the requirements for safe and civilized construction, and the like.