Building curtain wall mounting device

The invention discloses a building curtain wall installation device, and relates to the technical field of building construction, the building curtain wall installation device comprises two adsorption assemblies, each adsorption assembly comprises a suction cup, a groove is formed in each suction cup, a rubber ring is fixedly installed in each groove, a negative pressure cylinder is fixedly installed on each suction cup, and a convex block piston is slidably installed in each negative pressure cylinder; the protruding block piston is fixedly connected with a threaded cylinder through a piston rod, and the threaded cylinder is slidably installed on the outer surface of the negative pressure cylinder. By arranging the supporting assembly, part of the weight of the curtain wall can be shared to the waist, so that the force applied to the arms by the curtain wall is reduced, and the problem of arm ache caused by lifting the curtain wall for a long time is solved; adjustment is carried out according to the sizes o