As one of the fundamental laboratory grinding equipment, the planetary ball mill is an essential tool for exploring the ultra-fine grinding of numerous samples. With the rapid development of the national aerospace industry, the development of new materials has also entered a thriving field of scientific research. The exploration of each new material inevitably leads to another domain—"nanopowders." However, when powders reach the nanoscale, their activity becomes relatively high, making them prone to oxidation. To ensure the safer and more stable performance of materials, stainless steel vacuum atmosphere-protective ball mill jars have addressed this issue during the grinding process.