Ventilation shaft cleaning equipment for high-rise building

The invention relates to the technical field of ventilation shaft cleaning equipment, in particular to ventilation shaft cleaning equipment for a high-rise building. According to the technical scheme, two cleaning devices are arranged in the ventilation shaft, small cranes are arranged on the tops of the two floors, one ends of ropes of the small cranes are fixedly installed on the cleaning devices, the two cleaning devices are attached to the two floors respectively, an elastic supporting assembly is installed between the two cleaning devices, and the elastic supporting assembly is connected with the two cleaning devices through a connecting rod. The cleaning equipment comprises an auxiliary downward moving assembly installed at the bottom, the auxiliary downward moving assembly comprises a plurality of rubber wheels making contact with the floor, the cleaning equipment further comprises a brushing assembly and a cleaning assembly, and the brushing assembly comprises brushing bristles making contact with the