The function of turbocharging in diesel generator set is to increase the oxygen intake, so that the fuel of diesel generator set can be more fully burned, which increases the power of diesel generator set. Compared with the diesel generator set with natural air intake, the diesel generator set with turbocharging has a certain advantage in power. Turbocharging can increase the power of diesel generator set by 30% - 100%, even higher. However, due to the increase of unit pressure after supercharging, the friction of various parts of diesel generator set will increase. Turbocharged diesel generator set, because of its full combustion, has lower emission of harmful substances than ordinary diesel generator set, and is more environmentally friendly.