An ignition system for a tandem-type hybrid vehicle, the tandem-type hybrid vehicle comprising a plurality of engines , each engine being provided with a plurality of cylinders, the ignition system comprising: a plurality of ignition coils , each of the engines being configured to have at least one of the ignition coils , and each of the ignition coils comprising a primary winding and a secondary winding which are mutually matched; a single igniter provided with a plurality of output ports with the quantity corresponding to that of the plurality of ignition coils , each of the output ports being connected to the primary winding of one corresponding ignition coil so as to control the connection and disconnection of a current in the primary winding of the ignition coil ; and an electronic control unit configured for determining, according to a current power demand of the tandem-type hybrid vehicle, the number of the engines in the plurality of engines to be started, for determining the ignition coil to be boosted in the ignition coils in the engine to be started, for starting cylinders of the same engine to be started so as to minimize the number of the engines to be started and for issuing a corresponding ignition instruction, wherein the single igniter controls, according to the ignition instruction, the connection and disconnection of the current in the primary winding of the corresponding ignition coil to be boosted; the ignition system further comprises a plurality of spark plugs , each of the engines being configured to have the spark plugs with the quantity corresponding to that of cylinders of the engine; charactherized in that the secondary winding of each of a portion of the ignition coils is connected to one of the spark plugs so as to provide the spark plug with a high voltage required for sparkover individually, and the secondary winding of each of the other portion of the ignition coils is connected to two of the spark plugs so as to provide the two spark plugs with a high voltage required for sparkover simultaneously. a plurality of ignition coils , each of the engines being configured to have at least one of the ignition coils , and each of the ignition coils comprising a primary winding and a secondary winding which are mutually matched; a single igniter provided with a plurality of output ports with the quantity corresponding to that of the plurality of ignition coils , each of the output ports being connected to the primary winding of one corresponding ignition coil so as to control the connection and disconnection of a current in the primary winding of the ignition coil ; and an electronic control unit configured for determining, according to a current power demand of the tandem-type hybrid vehicle, the number of the engines in the plurality of engines to be started, for determining the ignition coil to be boosted in the ignition coils in the engine to be started, for starting cylinders of the same engine to be started so as to minimize the number of the engines to be started and for issuing a corresponding ignition instruction, wherein the single igniter controls, according to the ignition instruction, the connection and disconnection of the current in the primary winding of the corresponding ignition coil to be boosted; the ignition system further comprises a plurality of spark plugs , each of the engines being configured to have the spark plugs with the quantity corresponding to that of cylinders of the engine; charactherized in that the secondary winding of each of a portion of the ignition coils is connected to one of the spark plugs so as to provide the spark plug with a high voltage required for sparkover individually, and the secondary winding of each of the other portion of the ignition coils is connected to two of the spark plugs so as to provide the two spark plugs with a high voltage required for sparkover simultaneously. <EOS>