The invention discloses a human body fixing device suitable for a high-rise building glass cleaner. The human body fixing device comprises a wind power sensor, a speed sensor, a controller, a power module and a fixing device body. The wind power sensor and the speed sensor are both connected with the controller. The controller is connected with the fixing device body. The wind power sensor, the speed sensor, the controller and the fixing device body are all connected with the power module. The fixing device body comprises an ejector, a connecting belt and a suction cup. One end of the connecting belt is connected with the ejector, and the other end of the connecting belt is connected with a suction cup. Sensed data is transmitted by the wind power sensor and the speed sensor to the controller, the controller processes the data, when the wind speed and the speed reach certain data, the cleaner is fixed through the connecting belt connected with the suction cup, and the problems that inthe prior art, when cleaning is conducted only by hanging the cleaner, the cleaner shakes leftward and rightward during cleaning, and cleaning is neither convenient nor safe for the cleaner are solved.