In this paper, the old - fashioned KJ elevator system in carefully researched, and existing defects are fully analysed.The transformation idea is presented and algorithm in theory is designed.

• 在对KJ型提升机系统进行认真研究的基础上,对其在使用过程中存在的缺陷进行了全面分析,提出了改造设想并从理论上进行了验证。