Preparation method of high-stability and high-adsorption MOF nanofiber membrane

The invention discloses a preparation method of a high-stability and high-adsorption MOF (Metal Organic Framework) nanofiber membrane, and particularly relates to a preparation method of a high-stability Cu-BTC (Carboxymethyl Chitosan) (CMC)/PVDF (Polyvinylidene Fluoride) nanofiber membrane. The preparation method specifically comprises the following steps: firstly, preparing a spinning solution of a metal salt/fiber-forming polymer for synthesizing MOF, and uniformly dispersing metal ions in a nanofiber membrane through an electrostatic spinning method; and then inversely soaking the MOF nanofiber membrane in a solution of a ligand and a coordination polymer for synthesizing MOF, and carrying out coordination-induced self-assembly to obtain the MOF nanofiber membrane. The coordination polymer is self-assembled into the MOF structure, so that the strength of an MOF coordination bond is increased, the stability of the MOF structure is effectively improved, a molecular chain segment of the coordination polymer