The invention relates to chemical copper stripping drug liquid and a copper stripping method. The chemical copper stripping drug liquid is prepared by adding the following components into water in percentage by mass: 45-55% of sulfuric acid with a final volume concentration of 12-20%, 25-30% of hydrogen peroxide with a final volume concentration of 20-28%, a copper stripping agent with a final mass concentration of 4-10%, a stabilizer with a final mass concentration of 4-10% and copper sulfate with a final concentration of 5-52g/L. According to the chemical copper stripping drug liquid and thecopper stripping method, the copper stripping agent and the stabilizer are added into a drug liquid system with sulfuric acid and hydrogen peroxide; the decomposition of hydrogen peroxide in the chemical copper stripping drug liquid is effectively controlled; the stripping effect is improved; the stripping service life of the chemical copper stripping drug liquid is prolonged.