Energy-saving system of loader

The utility model discloses an energy-saving hydraulic system of a loader. The energy-saving hydraulic system comprises a hydraulic oil tank for providing high-pressure oil for an oil inlet of a distribution valve through a hydraulic pump, an a2 oil port and a b2 oil port of the distribution valve are respectively communicated with an a2 oil port and a b2 oil port of the pilot valve; an oil port A1 of the distribution valve is communicated with a large cavity of the rotating bucket oil cylinder, an oil port B1 of the distribution valve is communicated with a small cavity of the rotating bucket oil cylinder, an oil port B2 of the distribution valve is communicated with a large cavity of the movable arm oil cylinder, and an oil port A2 of the distribution valve is communicated with a small cavity of the movable arm oil cylinder. An oil port B2 of the distribution valve is communicated with an oil port P1 of the control valve through the first one-way valve, an oil port a2 of the distribution valve is communicat