Lubrication oil line of single variable valve timing (VVT) engine

The invention discloses a lubrication oil line of a single variable valve timing (VVT) engine. The lubrication oil line comprises a VVT oil line body and a cylinder cover oil line body which are connected with a cylinder body main oil passage through two independent oil passages respectively. According to the lubrication oil line of the single VVT engine, the two oil line bodies which are connected in parallel are led out from the cylinder body main oil passage directly, the VVT oil line body is arranged independently, the oil line is short, and accordingly the VVT responding and adjusting speed can be guaranteed; attenuation along the oil line is reduced, oil pressure in a cylinder cover is distributed uniformly, and accordingly the requirement of the far end of the cylinder cover for sufficient oil pressure can be guaranteed, and abnormal sounds and abnormal abrasions caused by insufficient oil pressure of the far end are prevented; the lubrication oil line is simple in structure and low in cost.