Abstract: The mining scale of a gold mine is 6500 t / d, and the lifting height of the skip is 780 m. In order to fully tap the lifting capacity of the mixed well and reduce the transformation cost, it is proposed to increase the lifting capacity of the mixed well by increasing the effective load of the skip without changing the main engine and the motor. In this paper, according to the actual project background, the skip load test selection, skip expansion scheme and wire rope selection scheme are first carried out, and then the improvement design is carried out on the aspects of lifting system check, lifting capacity calculation, hydraulic station setting value calculation, electric control adjustment suggestion and well tower structure design, which has achieved good technical and economic benefits, and provides design reference for the similar deep shaft lifting system expansion transformation project.