The invention relates to the technical field of diesel generators, in particular to an ultra-light
diesel generator set and a working method thereof, and the ultra-light
diesel generator set comprises an
oil tank, an
oil pump, an
electronic control unit, a
starter set, an engine and a generator connected to the output end of the engine; the oil inlet end of the
oil pump extends into the bottom of the
oil tank inner cavity; the other end of the
oil pump is connected with an oil inlet
pipe; an oil
injector is connected between the oil inlet
pipe and the engine; a pulse cracker is connected in the oil
sprayer; the
starter unit, the generator and the oil pump are all electrically connected to the
electronic control unit. And a
plasma ignition head is arranged on the engine. When the device is used, the device is high in low-temperature adaptability, high in starting and response speed, high in efficiency, high in reliability and more convenient to carry.