The invention discloses luminous self-healing micromolecular metal-organic gel, and a preparation method and application thereof, the luminous self-healing micromolecular metal-organic gel is preparedfrom terephthaloyl-acetylhydrazide (H4L1) and hydrated zinc acetate with the presence of a polarity organic solvent at the room temperature, the minimum mass fraction of the gel can reach 0.066% (solute/solvent*100%), the gel has a remarkable luminous effect, adsorbs dyestuff selectively, and has a thixotropic property and various functions such as self-healing, the multifunctional metal-organicgel is prepared from cheap raw materials under moderate conditions according to the simple, convenient and easy to operate preparation method.