The invention discloses an electric-control hydraulic energy-saving device for a load-sensitive ratio control system. The electric-control hydraulic energy-saving device is mainly used for the multi-load hydraulic system. According to the multi-load load-sensitive ratio control energy-saving device, maximum pressure required by loads is output through a load-sensitive pump; low-pressure load loops are judged through pressure sensors, then liquid-energy feedback devices are connected to the portions in front of throttling elements of low-pressure loops in series to achieve depressurization instead of the throttling elements, and feedback power is automatically adjusted. Pressure energy throttled by the low-pressure loops is fed back to an outlet of the load-sensitive pump through the liquid-energy feedback devices to be supplied to high-pressure loops for use. By means of the electric-control hydraulic energy-saving device, the problems that an existing multi-load hydraulic system device is large in hydraulic loss, low in efficiency, large in generated heat and the like are mainly solved.