The invention discloses an amine bisphenol tetradentate ligand trivalent rare-earth metal complex and application, and belongs to the technical field of ester compound polymerization catalysts. The amine bisphenol tetradentate ligand trivalent rare-earth metal complex has the structural general formula as shown in the specification; the amine bisphenol tetradentate ligand trivalent rare-earth metal complex is used as a catalyst; under a condition that no promoters are added, the amine bisphenol tetradentate ligand trivalent rare-earth metal complex can be used for catalyzing ring opening polymerization of racemate, butyrolactone, nalerolactone or caprolactone. The amine bisphenol tetradentate ligand trivalent rare-earth metal complex disclosed by the invention is stable in structure, highin catalysis activity, high in conversion rate and high in polymerization stereoselectivity.