Window cleaning machine is a permanent special equipment for cleaning and maintenance of facade and daylighting roof of high-rise buildings. It is necessary to design different types of window cleaning machines according to the height of the building, facade and roof structure, bearing capacity and effective space for equipment walking. That is to say, safety, economy and practicality should be considered, and the installed window cleaning function should be consistent with the building, so as not to affect the beauty of the building. So the selection of window cleaning machine is closely related to architectural design and construction. The window cleaning machine is an outdoor high-altitude manned equipment, so the safety and reliability requirements of the window cleaning machine are very high. Let's introduce the related knowledge of window cleaning machine.