Variable-amplitude oil cylinder hydraulic system and high-altitude operation machine

The invention belongs to the technical field of high-altitude operation, and discloses a variable-amplitude oil cylinder hydraulic system and a high-altitude operation machine. The hydraulic system comprises a variable-amplitude oil cylinder, and the variable-amplitude oil cylinder comprises a rodless cavity working oil way and a rod cavity working oil way which are both connected to a hydraulic oil tank; the two-way pump and the electromagnetic reversing valve are arranged in the rodless cavity working oil way in a series connection mode, the electromagnetic reversing valve is used for controlling the rodless cavity working oil way in an on-off mode, and the two-way pump is used for pumping hydraulic oil to a rodless cavity of the variable-amplitude oil cylinder through the electromagnetic reversing valve under the driving of the power generation motor or driving the power generation motor to generate power under the driving of oil return of the rodless cavity; and the electromagnetic switch valve is arrange