The utility model discloses an inclined curtain wall system. The upper ends and the lower ends of vertical posts are respectively connected through bolts, a connecting corner I and a connecting corner II, a horizontal frame is connected between adjacent vertical posts, the bottom and the top of a hollow glass plate are respectively connected with a glass support plate I and a glass support plate II, the inner side of the glass support plate I which is positioned at the bottom of the upper hollow glass plate is connected with one lateral edge of an auxiliary glass plate I, the other lateral edge of the auxiliary glass plate I is embedded into a hook groove and is fixed with the hook groove, the hook groove is formed on the horizontal frame and faces outwards, the inner side of the glass support plate II which is positioned at the top of the lower hollow glass plate is connected with one lateral edge of an auxiliary glass plate II, and the other lateral edge of the auxiliary glass plate II is pressed under the horizontal frame by a press block. An inclined curtain wall brings a novel and unique comprehensive design effect to buildings on the basis of function realization of a glass curtain wall. The inclined curtain wall system is high in construct speed and high in precision, solves the technical problems construction caused by large glass size, high construction height and obvious gradient, and provides technical reference for construction of the large-area inclined curtain wall of a high-rise building.