The invention comprises the preparation of a self-distribution seepage-regulation polymer and a self-distribution seepage-regulation water-controlling acidifying technology. The preparation of the regulation polymer comprises the steps of: adding 5-15 parts by mass of dimethyl diallyl ammonium chloride monomer, 2-8 parts by mass of acrylate monomer, 1-8 parts by mass of crylamide monomer, and the balance deionized water into a reaction vessel in turn; stirring the mixture; keeping the mixture at a constant temperature; introducing nitrogen to remove oxygen; adding a solid initiator which accounts for 0.2-0.8% by weight of the total mass; and allowing the obtained mixture to react for 7-9 hours under normal pressure. The self-distribution seepage-regulation water-controlling acidifying technology comprises the steps of preparation of a pad fluid, preparation of a cleaning agent, and performance of water-controlling acidifying construction. The preparation of the pad fluid comprises the steps of adding 0.2%-5% by weight of the self-distribution seepage-regulation polymer, 3%-15% by weight of hydrochloric acid or mud acid, and 0.5%-2% by weight of a corrosion inhibitor to clear water; and stirring the mixture uniformly under normal temperature and pressure. The preparation of the cleaning agent comprises the step of adding 2%-3% by weight of KCl brine to 20m3 of 1% by weight of a nonionic surfactant. The performance of water-controlling acidifying construction comprises the steps of washing a well in forward and reverse directions by running a tubing string; washing an oil reservoir wherein the pad fluid is injected under the pressure of less than70% of an oil reservoir fracture pressure; injecting a routine acidifying liquid and closing the well.