Construction method for additionally arranging floor type air conditioner steel frame platform on multi-story building

The invention discloses a construction method for additionally arranging a floor type air conditioner steel frame platform on a multi-story building. The construction method comprises the following steps that S1, an air conditioner outer steel frame foundation is manufactured; s2, 1 #, 2 # and 3 # steel frame platform components are prefabricated in a factory; s3, site construction preparation; s4, the remaining 1 #, 2 # and 3 # steel frameworks are fixedly connected; according to the air conditioner outer steel framework, through the factory-like prefabrication field assembly technology, the material cutting machining, assembling, welding and spraying processes are completed in a factory, and only simple bolt mechanical connection is needed on site. Complicated node position and node structure welding on a construction site is avoided, the construction quality can be effectively prevented from being affected by the complex environment on the site, the construction quality and the construction efficiency are