The utility model relates to a generator and particularly relates to an indicating lamp mechanism at the top end of a generator. The utility model mainly aims to provide a solution to the technical problem existing in the prior art that the running condition of a generator can only be known through a machine screen or in a central control room and cannot be known in a plant when the generator is running. The indicating lamp mechanism comprises an upper frame (1) and a lower frame (2) and is characterized in that the upper frame (1) and the lower frame (2) are internally provided with a spindle (3), the spindle is connected with rotors (4), each rotor is connected with a brake pipeline (5), the periphery of each rotor is provided with a stator, the upper end of the spindle is provided with a collector ring (7), the periphery of the collector ring is provided with a carbon brush frame (8) and a brush frame holder (9), and the top of the brush frame holder is provided with indicating lamps (10).