Fuel-saved and energy-saved diesel generator

The invention discloses a fuel-saved and energy-saved diesel generator. The fuel-saved and energy-saved diesel generator comprises a first generator set, a second generator set, a first set controller, a second set controller, a central control unit, a power supply switching controller and a power supply switching switch; the first and control set controllers are in communication and parallel connection with the central control unit; the first generator set is in serial connection and communication with the first set controller; the second generator set is in serial connection and communication with the second set controller; the first and second generator sets are electrically connected with the power supply switching switch, and are in communication connection with the power supply switching controller; and the power supply switching controller controls the operation of the power supply switching switch. The fuel-saved and energy-saved diesel generator can largely reduce the equipment loss, reduces the fault rate, prolongs the service life of the sets, can save the oil consumption, and saves the energy.