Weft yarn on-line lubricating device of weaving machine

The utility model belongs to the technical field of textile engineering, and particularly relates to a loom weft yarn on-line lubricating device which comprises a fixing assembly, an oil storage bottle, an oil absorption piece and a lubricating fixing assembly, the oil storage bottle is fixedly installed on the fixing assembly, and the lubricating fixing assembly is fixedly arranged on the oil storage bottle. The lower end of the oil absorption piece is arranged in the oil storage bottle, the upper end of the oil absorption piece is fixed to the lubricating fixing assembly, and weft yarn penetrates through the upper end of the oil absorption piece. Wefts firstly penetrate through the oil absorption part before entering the weaving machine, the oil absorption part absorbs lubricating oil in the oil storage bottle, so that the surfaces of the wefts are coated with a layer of lubricating oil film after the wefts penetrate through the oil absorption part, the lubricating oil film coats original adhesive films on