The utility model discloses a kind of external fuel supply device of EVB system, including the machine body, the EVB system and the EVB system oil path which can provide oil for the EVB system; on the machine body is set the main oil path; on the machine body is set the oil pipe connected to the main oil path of the machine body; on the oil pipe is set the branch pipe; the branch pipe is connected to the oil path of the EVB system. The utility model avoids the difficulty of the oil getting of the EVB structure as a result of the tight space inside the cylinder head; the model is convenient in arrangement and dismantling, which will not influence the performance of the cylinder head; the adaptability of the model is strong.