The invention discloses a novel central air conditioner scale inhibitor corrosion inhibitor. A preparation method of the novel central air conditioner scale inhibitor corrosion inhibitor comprises thefollowing steps: S1, polymerizing the following raw materials: AMPS, acrylic acid, methyl acrylate, cis-butenedioic acid, 2-itaconic acid, ammonium persulfate, sodium hydrogen sulfite, a catalyst, amolecular weight regulator, a azoles corrosion inhibitor and the like; and S2, mixing cis-butenedioic acid and 2-itaconic acid in a ratio of 2 to 1 (totaled in 200g), dissolving the mixture in 500ml of deionized water, adding the mixture into a reaction kettle, and heating to 98 to 110 DEG C. Compared with the prior art, the novel central air conditioner scale inhibitor corrosion inhibitor has thefollowing advantages: for the scaling problem of the central air conditioner water treatment industry, in order to save the energy and reduce the emission and improve the refrigeration efficiency, aZhongrui 963-series water treatment agent is researched after the efforts of multiple years; and the chemical is used for multiple years, and a direct effect is that the central air conditioner systemhas zero scaling after being operated for 8 years. The central air conditioner system does not need to be cleaned and descaled. The electric charge saved every year is multiple times of the expense of the water treatment agent. The fundamental problems of the industry can be solved.