对瓶盖加工模具在生产使用中突然出现的裂纹及崩刃等现象进行了分析，指出失效的主要原因是原热处理工艺不当使其硬度偏高所致．鉴于此，本文对其进行了实验研究，并制定了新工艺． The phenomenon of sudden appearance of cracks and collapsing of the mold during the production and application of the bottle cap was analyzed. It was pointed out that the main reason of the failure was the high hardness of the original heat treatment process. In view of this, this article has carried on the experimental research to it, and has made the new craft.