The invention relates to a connecting rod static oil coating technology and device. A connecting rod workpiece is hung on a bracket of a connecting rod transmission system in an oil coating room. An oil coating knife beam is connected with negative high voltage static to form a high voltage electric field with a connecting rod workpiece that is used as a ground connection. An antirust oil flows out of a narrow gap of a knife opening of the oil coating knife beam, and the antirust oil is pelletized by the high voltage static and absorbed to the workpiece. The oil coating quantity on the surface of the connecting rod workpiece is controlled by controlling the antirust oil flow and the workpiece turning speed, so that the oil is coated on the connecting rod by the static. The connecting rod static oil coating device disclosed by the invention has the advantages of reasonable structure, small occupying space, good universality, and capabilities of saving the antirust oil usage amount, reducing labor intensity, reducing operation staff and adapting the connecting rod workpieces with various shapes for rust prevention. The use amount of the antirust oil can be reduced to be 15% of the use amount in the prior art. Meanwhile, the cleaning quality of the connecting rod after performing the rust prevention is guaranteed.