The invention discloses an adjustable angle corner section material system for a curtain wall, which relates to a multi-corner section material system for a curtain wall, in particular to a corner section material system for a glass curtain wall. The section material system comprises a corner column, a corner cross beam, a connecting corner connector, an insulation spacer, a cross beam cover plate, a corner auxiliary frame, a common auxiliary frame, a curtain wall panel, a corner press piece and a side sealing gland. The corner column is used for installing the curtain wall; the connecting corner connector is arranged on one end part of the corner cross beam; the insulation spacer is arranged on the corner column together with the corner cross beam and the connecting corner connector through connecting bolts; the cross beam cover plate is arranged on the corner cross beam; the corner auxiliary frame and the common auxiliary frame adhere to a processed curtain wall panel through silicone structural adhesive; after the silicone structural adhesive is solidified, the common auxiliary frame on a horizontal edge of the curtain wall panel is hung onto the corner cross beam, and the corner auxiliary frame on a vertical edge of the curtain wall panel is arranged on the corner column through the corner press piece and a connecting screw; and after all parts are in position, the side sealing gland is installed to form the adjustable angle corner section material system.