The invention provides a hanging bracket system applied to a narrow space of a jacking platform. In the jacking platform, the narrow space is formed between a wall and a construction elevator or an inside-climbing tower crane, and the hanging bracket system comprises trusses, two stand columns, a plurality of connection rods, hanging bracket pedals, turning plates and pulling pieces, wherein the trusses are hung to the jacking platform side by side; the two stand columns are located in the narrow space; the multiple connection rods are connected to the two stand columns at intervals; the hanging bracket pedals are fixed to the connection rods; the turning plates are hinged to the hanging bracket pedals; the pulling pieces are connected to the turning plates and the stand columns in a pulled mode. The hanging bracket system solves the problem that it is difficult to arrange a hanging bracket in the narrow space of the jacking platform.