A suspension display rack has a board, a rail, and multiple brackets. The board has a back-strip. The back strip has two first positioning holes. The rail is mounted on a front surface of the board and has an upper lug and a lower lug formed respectively on a top and a bottom of the rail. The brackets are mounted on the rail and each bracket has a bar engaging with the board, a holder (21) and a seat. When the board is mounted securely on a wall or a tool car, tools can connect to the seats of the brackets for positioning.