The invention discloses a high-rise building external wall insulation board construction method. The method comprises the following steps: being in construction preparation stage, finishing banding a structure steel, deploying a XPS board according to formwork line releasing condition, binding a pad on a wall rib, hoisting the XPS board in position, binding and fixing the XPS board and ribs at outer side the wall, supporting and fixing the formwork, pouring concrete, removing a mold, pulling the bolt outer side and pulling down upwardly to be parallel to the wall surface and repairing the formwork and maintaining the concrete. The high-rise building external wall insulation board construction method has the advantages of being convenient and flexible in construction operation, easy to grasp the construction process, strong in pertinence, improving the working efficiency and shortening the construction period. The Glodon (BIM) software is used to layout in advance for the external wall insulation boards of commercial regions and standard layers, the industrial processing and distributing are carried out combining the design drawing actual size; the leftover bits and pieces are reasonably used, the material consumption is reduced, the production of construction waste is reduced, and the natural environment is protected. The external wall insulation board is bonded firmly with the concrete wall body through a main structure construction method, thus the safety performance is high, and the secondary construction pollution can be reduced; formwork turnover using rate is improved, formwork loss is reduced, and materials are saved; the basket using period is shortened, which plays a role of saving energy; construction basket using period is shortened to reduce the repairing and maintaining costs of equipment.