The invention discloses a cast iron material for a piston ring carrier and a preparation method of the cast iron material. The cast iron material comprises the following chemical components in percentage by mass: 2.3 to 4.4 percent of carbon, 1.6 to 4.2 percent of silicon, 0.005 to 0.499 percent of manganese, 8.0 to 18.0 percent of nickel, 3.6 to 9.0 percent of copper, less than or equal to 2.5 percent of chromium, less than or equal to 0.03 percent of magnesium, less than or equal to 0.08 percent of rare earth, less than or equal to 0.03 percent of calcium and zinc, less than or equal to 0.15 percent of titanium, less than or equal to 0.1 percent of sulfur, less than or equal to 0.15 percent of phosphorus and the balance of iron and inevitable impurities. The magnesium content of prepared low-manganese high-nickel austenitic vermicular cast iron is lower than 0.5 percent, strong tensile strength is achieved, the technical bias is overcome, and an unexpected technical effect is achieved.