Prefabricating mold and prefabricating production line of concrete duct piece

The invention relates to the technical field of wind power generation, and discloses a concrete segment prefabricating mold and a prefabricating production line thereof, which can adjust the thickness of a concrete segment, improve the utilization rate of the mold and reduce the cost. The prefabricated mold of the concrete pipe piece comprises an inner mold; the inner side face of the outer module is obliquely arranged in the height direction; the outer die set comprises m outer die single bodies which are sequentially arranged in the height direction and are mutually independent, and n adjacent outer die single bodies in the m outer die single bodies are sequentially and detachably connected to form an outer die; the outer mold and the inner mold are arranged at intervals, and the side face, corresponding to the inner side face of the outer mold set, of the outer mold is arranged opposite to the inner mold; wherein m and n are integers greater than 1, and m is greater than n; the bottom die is arranged at th