A biological self-assembled nanocrystal injection having a lymphatic targeting function and an administration method for targeting a lymphatic system using the biological self-assembled nanocrystal injection. The injection comprises 0.05-5% of mitoxantrone and a salt thereof, 0.1-10% of an osmotic pressure regulator, 0.001-0.1% of a buffering agent, 0.01-0.1% of an antioxidant, 0.05-1% of an adsorbent, and 0-20% of a filler. The administration method is interstitial injection, and a lymph node will produce a blue color visible to the naked eye after passive targeting to the lymphatic system.
