▎ 摘　　要

NOVELTY - A sensing electrode of lactic acid sensor preparation method involves preparing lactate oxidase and electrode materials, where the electrode materials preparation step involves preparing graphene oxide and graphene quantum dot composites and treating glassy carbon electrodes. USE - Method for sensing electrode of lactic acid sensor (claimed). ADVANTAGE - The method enables preparing highly efficient sensing electrode of lactic acid sensor. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following: (1) a sensing electrode of lactic acid sensor prepared by the method (2) a lactic acid sensor.