This paper analyses the wear reason of cylinder using in mine, introduces a kind of sample and reliable new technology to repair oil cylinder movable, this method can use in nomal machine repair shop, has certainly economic benefits. 分析矿用油缸活柱磨损的原因,介绍1种简单、可靠的新工艺,修复矿用油缸活柱,此方法可用于一般矿区机修厂,具有一定的经济效益。