The invention relates to the field of water treatment agents and discloses a malic acid compounded corrosion and scale inhibitor composition. The composition contains a component A, a component B and a component C; the component A is a product obtained after first zinc salt, organic acid and alkali metal hydroxide make contact, wherein the first zinc salt is one or more of zinc chloride, zinc sulfate and zinc nitrate, and the organic acid is optionally a mixture of malic acid and gluconic acid and/or a mixture of malic acid and ascorbic acid; the component B is composed of second zinc salt, wherein the second zinc salt one or more of zinc chloride, zinc sulfate and zinc nitrate; the component C is acrylic polymer, wherein structure atoms of the acrylic polymer do not include phosphorus, phosphorus and sulfur. The invention further discloses a malic acid compounded corrosion and scale inhibitor which contains the composition and application of the malic acid compounded corrosion and scale inhibitor. The malic acid compounded corrosion and scale inhibitor has good resistance to calcium carbonate scale, calcium sulfate scale and calcium phosphate scale and also has a corrosion inhibition effect.