Preparation mold of precast block for paving concrete faced rockfill dam

The utility model discloses a preparation mold of a precast block for paving a concrete faced rockfill dam. The preparation mold comprises a first mold and a second mold, the first mold and the second mold are spliced to form a regular hexagonal mold, and a regular hexagonal prefabricated groove is formed in the middle of the mold; a first metal fastening belt is arranged on the outer side of the first mold, hooks are arranged at the two ends of the first metal fastening belt, a groove is formed in the end face, making contact with the second mold, of the first mold, and a protrusion matched with the groove is correspondingly arranged on the end face, making contact with the first mold, of the second mold; and a second metal fastening belt is arranged on the outer side of the second mold, and spring lock catches matched with the hooks are arranged at the two ends of the second metal fastening belt. The mold is of a detachable splicing structure, demolding of the prefabricated blocks is facilitated, and damage