The invention relates to the field of ophthalmological medical equipment, in particular to a lacrimal passage pull wire. The technical scheme adopted by the invention for solving the technical problems is that a small hole is split in a position close to one end of a section of thin nylon wire by using a knife, so as to form an eye. The lacrimal passage pull wire is used for threading a lacrimal passage upholder, and one end of the lacrimal passage pull wire is made into a ball shape and is used for blocking a needle hole of a lacrimal passage leading-in needle so as to form a circular needle head and facilitate the insertion of the lacrimal passage leading-in needle into a lacrimal passage. The lacrimal passage pull wire has the beneficial effects that the lacrimal passage pull wire does not need to be knotted, so little injury is caused to the lacrimal passage; a straight-hole lacrimal passage pull wire leading-in needle can be used, so the lacrimal passage pull wire can straightly pass in and out of the lacrimal passage and the convenience and the rapidity are realized.