The invention provides corrosion acidizing fluid aiming at clay minerals and a preparation method of the corrosion acidizing fluid aiming at clay minerals. The acidizing fluid is prepared from hydrochloric acid, fluoboric acid, acetic acid, trifluoroacetic acid, hydrogen peroxide, ammonium chloride, dimethylaminomethyl benzotriazole, alkyl ammonium chloride and polypotassium methacrylate. The acidizing fluid is capable of effectively corroding organics such as clay minerals and cements in high-temperature oil and gas reservoirs at a temperature of 160 DEG C or above, hydration swelling and migration of clay particles in an acidizing process are inhibited, and accordingly secondary precipitation on the reservoirs is avoided, and the infiltration capacity of the reservoirs is improved. In addition, the corrosion acidizing fluid is convenient to prepare on site and use and is safe and reliable.