The invention provides a single-column mechanical lifting device, and relates to the technical field of electrical system mechanical equipment. A column, a supporting plate, an upper pressing plate, alower pressing plate and a rotary handle are mechanically connected to realize lifting. The single-column mechanical lifting device is simple in structure, ingenious in design, easy to receive and transport and convenient and fast to operate, time and labor are both saved, the operation range is small, and the lifting device is flexible to use. The lifting device is more reliable and low in costby using a pure mechanical structure, the work safety and work efficiency of power workers can be effectively improved, the design is reasonable, and the structure is compact. The lifting device is small in available working space, simple in operation and easy to maintain, can be used in various occasions of a transformer substation, and can be completed the operation by one person. The lifting device can be used for lifting of all kinds of small and medium-sized power equipment, and is universal and convenient and wide in applicability.