The invention relates to the field of manufacturing of automobile engines, and provides an oil coating device for engine cylinder head oil duct holes. The oil coating device for the engine cylinder head oil duct holes comprises oiling bars and further comprises a mounting plate and a row of positioning columns, wherein a handle is arranged at the upper end of the mounting plate, and the upper ends of the positioning columns are connected with the lower end of the mounting plate. The oiling bars are arranged at the lower end of the mounting plate, and the two sides of the row of positioning columns are each provided with two rows of the oiling bars. When the oil coating device for the engine cylinder head oil duct holes is used, each positioning column is inserted into a sparking plug mounting hole for positioning, each oil duct hole is coated with oil through the corresponding oiling bar, and therefore the multiple oil duct holes are simultaneously coated with oil at a time; the oil coating device for the engine cylinder head oil duct holes is high in oil coating efficiency and good in oil coating quality.