The invention discloses an installment method of prefabricated hanging plates with reversely poured stones. Compared with existing installment methods, installment process of the method is no longer an irreversible nonrecurring project. When perpendicularity is found inconsistent with requirements in the final checking process, installment work can be repeated until the perpendicularity meets the requirements, thereby providing adequate remedial measures to improve installation accuracy. During the processes of installment, several working procedures such as primary adjustment, precise adjustment, inspection for confirmation and the like, are conducted to realize the purpose of repeatedly adjusting during the installment, thereby ensuring the installation accuracy. Additionally, according to the installment method, rebar and some other structures are not needed to be preset on prefabricated concrete hanging plates with reversely poured stones, thereby reducing production costs of prefabricated concrete hanging plates with reversely poured stones, and providing prominent economic benefits.