Dedicated device for improving starting capacity of diesel engine

The invention discloses a dedicated device for improving the starting capacity of a diesel engine. The dedicated device comprises a fuel tank, a fuel conveying pump, a fuel filter, a plurality of fuelinjection pumps and a fuel supplementing tank, wherein the fuel tank is used for storing fuel; the fuel conveying pump pumps fuel from the fuel tank through a pipeline; the fuel filter communicates with the fuel conveying pump through the pipeline and filters fuel pumped out of the fuel conveying pump; the fuel injection pumps receive the fuel filtered by the fuel filter through the pipeline; thefuel supplementing tank is arranged above the fuel injection pumps and supplements fuel to the fuel injection pumps through the pipeline; and the fuel tank, the fuel conveying pump, the fuel filter,the fuel injection pumps and the fuel supplementing tank constitute a fuel inlet passage. The dedicated device enables the fuel injection pump and a connecting pipeline to be filled with fuel for a long time, so that the engine