Brake device of wind turbine generator and wind turbine generator

The utility model relates to the technical field of wind turbine generator braking, and discloses a wind turbine generator braking device and a wind turbine generator, the wind turbine generator braking device comprises a cabin, a main generator is fixedly assembled on the inner wall of the cabin, an output shaft of the main generator is fixedly sleeved with a rotating rod, and a gearbox is fixedly assembled on the inner wall of the bottom of the cabin; the outer edge of the rotating rod is fixedly sleeved with a main bevel gear. According to the wind turbine generator braking device and the wind turbine generator, through the arranged cabin and main generator structure, when the rotating speed is too high in the operation process of the wind turbine generator, a controller automatically controls an output shaft of an electric telescopic rod to extend, and therefore an auxiliary bevel gear makes contact with a main bevel gear; the resistance area and size of the rotating rod in the rotating process are increa