The invention provides a furan dioctyl phthalate manganese metal organic skeleton material and preparation method. The chemical compound is a first complex formed using furan dioctyl phthalate and metal manganese, (HDMA).(HETA) Mn3 (FDA) 4 contain tricyclic and tetracyclic, unsymmetric structure units include three Mn positive ions, four FDA molecules and a protonation dimethylamine positive ion and a protonation triethylamine, manifesting an electrified framework. The secondary structure unit of tripolymer is arranged by a common vertex, the neighboring secondary structure units through the connection of two oxygen atoms of FDA carboxyl molecule extend along an infinite chain, forming a metal organic skeleton material with network structure, the material can be applied to the separation of air body and the absorption of carbon dioxide and the like.