分析了现有液压提升要机提升速度控制存在的问题，提出采用手动同步缸控制液压防爆提升机提升速度的新方法，分析了该控制方式的工作原理的特点，并对手动操作同步缸的主要参数进行了设计计算。 The existing problems of lifting speed control of hydraulic lifting machine are analyzed. A new method to control the speed of hydraulic explosion-proof lifting machine by using manual synchronous cylinder is proposed. The principle of the control method is analyzed. The parameters were calculated.