The invention discloses a lobster shell and water shield lipid-lowering biscuit which is prepared by the raw materials in parts by weight as follows: 50-60 parts of wheat flour, 12-14 parts of sorghum flour, 12-15 parts of soybean flour, 3-4 parts of cassava starch, 6-8 parts of lobster shells, 14-15 parts of vegetable oil, 2-4 parts of hawthorn seed powder, 10-15 parts of hawthorn fruit, 4-6 parts of caraway, 13-14 parts of cane sugar, 4-5 parts of skim milk powder, 1.3-1.6 parts of ammonium hydrogen carbonate, 0.1-0.3 part of calcium gluconate, 0.05-0.08 part of zinc gluconate, 0.5-0.6 part of low-sodium salt, 0.1-0.2 part of a flavouring agent, 1-2 part of onion powder, 10-12 part of hawthorn flowers, 2-3 parts of water shield, 4-6 parts of castanea seguinii dode leaves, 3-5 parts of lotuses, 0.2-0.3 part of Juncus communis, 0.4-0.6 part of fiveleaf gynostemma herb and a defined amount of water. The lobster shell and water shield lipid-lowering biscuit is crisp in taste, unique in flavor, high in calcium content and low-sugar, and has functions of health maintenance, lipid reduction and health care simultaneously.