Abstract: In recent years, in the construction engineering market, people are paying more and more attention to the environmental protection of buildings. Because of the technical, economic and ecological characteristics of prefabricated buildings, prefabricated buildings are widely welcomed by people in the construction market and have great development potential in the future. However, in the implementation of prefabricated building projects, mechanical and electrical installation difficulty coefficient is high, in order to ensure the realization of mechanical and electrical equipment in the prefabricated building function, it is necessary to do a good job in the construction of prefabricated building, mechanical and electrical installation technology selection and quality control.