Abstract: The present invention relates to the technical field of organic light-emitting materials, and provides a tetradentate cyclometalated platinum (II) coordination complex based on carboxyl coordination and containing pyridyl acridine, and use thereof. The tetradentate cyclometalated platinum (II) coordination complex has the structure of the general formula (I): In the present invention, the tetradentate cyclometalated platinum (II) coordination complex includes a tetradentate ligand containing a strong-field ligand of an oxygen negative ion, with strong coordination capability and high rigidity, which can improve the quantum efficiency and photostability.