Abstract: Hydraulic excavators are widely used in engineering due to their unique advantages. However, hydraulic excavators consume huge amounts of energy. Improper control will directly increase the application cost of hydraulic excavators. Therefore, it is necessary to carefully do power matching and energy-saving control work. Based on this, this article discusses the power matching of the hydraulic excavator power system and its energy-saving control measures, in order to further promote the high-quality development of my country's engineering industry.