Abstract: The present disclosure provides a method for improving a conductivity and a blue light filtering efficiency of a transparent conducting oxide (TCO). The method includes the following steps: placing an indium oxide-based transparent conducting material (TCM) as a sample into a sample chamber of a high-pressure apparatus, and conducting a room-temperature high-pressure treatment, where the room-temperature high-pressure treatment refers to compressing the sample to a target pressure of 51 GPa from ambient pressure at room temperature and holding the target pressure for 5 min, and then conducting decompression to the ambient pressure. The conductivity is detected during the compression and the decompression, and the blue light filtering efficiency is detected separately before and after the room-temperature high-pressure treatment.