Tool type steel structure work external wall mounting and positioning method

The invention provides a tool type steel structure work external wall mounting and positioning method, and belongs to the technical field of external wall safety protection and external wall panel mounting and positioning overturn-preventing. The mounting and positioning method comprises the steps that size measuring is conducted in a site, and machining and manufacturing are conducted in a factory; the outer side of each set of positioning fence is reinforced by nuts so as to be welded to an outer side fence; iron rings are welded to the two ends of a long fence on the outer side; a control line is marked on an outer side steel frame column; components are transported to the site and directly mounted; for the first step, a long rod, a short rod, bolt rods and nuts at the position are selected; for the second step, mounting is conducted; firstly the position which is 200mm distant from the building ground is mounted; a positioning fence is reinforced at the position which is 200mm below a steel beam before an