Base oil tank of diesel generating set

The utility model discloses a base oil tank of a diesel generating set. The base oil tank of the diesel generating set comprises a tank body, a covering board, two access holes of the same size and shape, a first access cover, a second access cover and an oil inlet pipe, wherein the covering board covers the tank body; the two access holes are formed in the left side and the right side of the covering board respectively; the first access cover and the second access cover cover the two access holes. The first access cover is provided with an oil meter, an oil filling port and an oil inlet pipe connector; the oil inlet pipe connector is provided with an inner thread; the second access cover is provided with an oil return pipe connector and a standby connector both of which are the same as the oil inlet pipe connector in diameter and are provided with inner threads; one end of the oil inlet pipe is provided with an outer thread connected with the oil inlet pipe connector, so that the oil inlet pipe is detachably