The invention relates to a production method of paint and in particular relates to a production method of an alcohol-based flow coating paint for cast iron. The production method of the alcohol-based flow coating paint for the cast iron comprises the following steps: adding a dissolved rosin liquid and a pretreated bentonite liquid into a dispersing kettle, then sequentially adding ethanol, a combustion-supporting agent, isopropyl alcohol and a thickening agent in residual content, carrying out electric stirring, sequentially adding polyvinyl butyral, a silicate composite suspending agent, a defoaming agent and a surface active agent into the dispersing kettle, regulating the stirring rate to be 500r/min after charging is finished, sequentially adding flake graphite and mullite into the dispersing kettle, regulating the stirring rate after charging is finished, dispersing, sequentially adding quartz powder and white corundum into the dispersing kettle, regulating the stirring rate to be 1200r/min after charging is finished, dispersing for 20 minutes, and discharging. The production method of the alcohol-based flow coating paint for the cast iron is unique, and the produced alcohol-based flow coating paint for the cast iron has the advantages of superior liquidity, good levelling property, high suspension stability, heat shock crack resistance, high temperature stability, sand burning resistance and low gas-forming property.