Mold for preparing composite material fan blade and preparation method of composite material fan blade

The invention provides a mold for preparing a composite material fan blade and a preparation method of the composite material fan blade. The mold comprises an upper mold body and a lower mold body, the upper mold body comprises an upper molded surface, the lower mold body comprises a lower molded surface, the upper molded surface and the lower molded surface are spliced to form a cavity used for forming fan blades after the upper mold body and the lower mold body are assembled, and each fan blade comprises a blade body and a fan hub base which are connected; the parting line of the cavity is positioned at the maximum outline of the fan blade; and after the upper mold and the lower mold are closed, a parting surface is formed between the upper mold and the lower mold, and the parting surface is formed by horizontally extending a parting line outwards. According to the mold for preparing the composite material fan blade and the preparation method of the composite material fan blade, the mold design, the layer l