Method for detecting performance of power station boiler air pre-heater

The invention relates to a method for detecting performance of a power station boiler air pre-heater. The method comprises the step one of building a detecting platform, the step two of sampling and inputting, wherein data are collected and original data are input, and the step three of calculating, wherein an air leakage rate AL of the air pre-heater is calculated, the smoke efficiency of the air pre-heater is calculated, and a heat transfer ratio of the air pre-heater X is calculated according to a formula (15). Various kinds of sensors required by the method are easy to install, and therefore the problem of on-line monitoring of the performance of the power station boiler air pre-heater in normal operation is solved, and ration data of the operation state of the air pre-heater can be provided for operation and maintenance of a power station boiler.