The invention discloses a sucking feed for leeches, which relates to the technical field of feedstuff. The sucking feed is prepared from the following components in percentage by weight: 55-80% of fishmeal, 5-15% of conch meal, 5-10% of soymeal, 1-5% of germ meal, 3-5% of blood meal, 1-5% of yeast and 1-2% of chitosan and colloid protein. The preparation method comprises the following steps: preparing raw materials, tedding, preliminary cleaning, grinding and mixing. The sucking feed provided by the invention significantly improves the feeding strength of leeches, promotes the growth of leeches, improves the yield of leeches and the survival rate of young leeches, improves the utilization rate of the feed, improves intestinal micro environment of the leeches, stimulates the leech bodies to emerge strong immune and stress response and improves the immunity and quality of the leeches.