The steam turbine's flow section has been cleaned with new technology, and after the efficiency test of the steam turbine, the heat rate has been reduced from 9666 kJ/kWh before maintenance to 9513.9 kJ/kWh after maintenance, and the high-pressure cylinder efficiency has increased from 46.85% before maintenance to 48.21% after maintenance. Of course, the improvement in steam turbine efficiency is also related to the adjustment of the gland clearance. However, the removal of salt scale in the flow section plays a crucial role in improving the efficiency. The improvement in the cleaning process of the turbine blades increases work efficiency, reduces maintenance costs, and causes no damage to the blades. The cleaning is effective, with no environmental pollution. During maintenance, it reduces labor intensity while shortening maintenance time, resulting in greater economic benefits, which are advantages that conventional methods cannot achieve.