Lacrimal passage tube

The invention relates to a lacrimal passage tube for an eye. The lacrimal passage tube comprises a tube body, a needle core and a needle core inlet, wherein the needle core inlet is arranged on the tube body; the needle core comprises a liquid injecting port and a liquid discharging hole; the needle core is inserted into the tube body through the needle core inlet; a side hole is formed at a position on the tube body which is close to the liquid discharging hole; and the liquid injecting hole of the needle core is exposed outside the tube body. The lacrimal passage tube disclosed by the invention has the advantages of safety and reliability of use, convenience for operating and wide application.