Building insulation board positioning and mounting device

The invention relates to the field of building construction, in particular to a building insulation board positioning and mounting device which comprises a plurality of keels mounted on a wall, limiting parts, a driving mechanism and insulation mechanisms, the keels are distributed at intervals in the height direction of the wall, the insulation mechanisms are all connected with the keels in an inserted mode, and the limiting parts are arranged on the keels. The heat preservation mechanisms are sequentially arranged in the length direction of the keels in an abutting mode, the heat preservation mechanisms installed on the adjacent keels abut against each other, the driving mechanism is connected to the keels, the multiple limiting pieces are connected to the positions, close to the heat preservation mechanisms, of the driving mechanism, and the driving mechanism is used for driving the limiting pieces in the direction close to or away from the heat preservation mechanisms. The limiting piece presses the heat