The invention discloses a vertical manufacture method for a scoria concrete sandwich thermal insulation external wall panel. The vertical manufacture method comprises the following steps: step 1, formulation of a production technological process; step 2, production preparation; step 3, installation of a mold table; step 4, installation of a wall panel inner core; step 5, installation of a window inner mold and a door inner mold; step 6, installation of an inner leaf mold and an outer leaf mold; step 7, casting of protective layer concrete; step 8, maintaining and demolding; and step 9, end product delivery. The vertical manufacture method has the following beneficial effects: a power trowel, a flattening machine and a mold roll-over machine are omitted, so that the area of a production site is saved, the construction is convenient and fast, factory production and assembly construction are realized, the degree of industrialization is high, lots of social labor force is saved, and the social efficiency is improved. The construction speed is high, the building period is short and the construction cost is remarkably lowered.