The invention discloses a labor-saving (power-dispersed) electric train and a ground power supply technology. The labor-saving electric train comprises a train body, a chassis, labor-saving motors, a labor-saving generator, a computer, a display, a transducer, a sensor, a lead, electric brushes, a transformer, a brake, a brake plate, an absorber, wheels, a steel rail, an electric wire, a car light and an instrument, wherein the computer, the display, the transducer, the sensor, the brake, the transformer and the labor-saving generator are arranged inside a headstock; the front and rear parts of the base plate of the headstock are respectively provided with four labor-saving motors and wheels; the two heads of the chassis of each wagon box are respectively provided with four labor-saving motors and wheels; and the electric brushes are respectively arranged at the headstock and a tailstock for conducting electricity to the labor-saving generator, and can emit 200KV power for running of the train by energy consumption of one horsepower. Another labor-saving electric train (namely a power-dispersed diesel-electric train) in the figure 16 is the same as that in the figure 1 in principle and function; and only a labor-saving diesel generator is used for generating electricity for running of the train. The labor-saving electric train has a good labor-saving effect and a good energy-saving effect, is high in variable speed, and is a fastest high-speed train in the world.