The invention discloses a mold of friction welding equipment for an automobile spoiler production and a welding method. The mold comprises a base, a lower mold, guide columns, an upper mold, guide holes, a cooling assembly and an ejecting assembly, wherein the top of the base is connected to the lower mold through a cooling assembly, and guide columns are mounted on corresponding two sides of thetop of the lower mold; guide holes are formed in corresponding two sides of the bottom of the upper mold, and the upper mold is connected to the outer sides of the guide columns in a sleeving manner and is connected to the lower mold; and the ejecting assembly is mounted on the top of the base; the cooling assembly comprises a cooling tank, a liquid pump, a heat isolating plate, a cooling pipeline, a cooler, a first return pipe, a second return pipe and a liquid extraction pipe, the cooling tank is arranged on the top of the base, and the liquid pump is mounted in the cooling tank. According to the mold, the mold is quickly cooled and stripped favorably, and mold ejection is also assisted favorably, so that the mold stripping efficiency is improved.