This standard establishes a test method for evaluating the friction and wear performance of diamond-like carbon (DLC) films using the ball-on-disk method. It specifies key technical elements such as specimen preparation, instrumentation, testing procedures, and result calculation in detail, and is applicable for determining the coefficient of friction and wear rate of DLC films under dry friction conditions. This method accurately simulates the tribological behavior of materials by forming a friction pair between a standard steel ball and a rotating coated specimen under a certain load. The core testing instrument is a ball-on-disk friction and wear tester, which must be equipped with a stable loading system and rotational speed control function, capable of real-time friction force acquisition and coefficient of friction calculation. Additionally, to quantify the degree of wear, high-precision profilometers or three-dimensional white light interferometers are typically required to obtain key data such as wear depth, width, and volume, thereby comprehensively assessing the wear resistance of DLC films.