Method for testing and evaluating LPI performance of data link

The invention discloses a method for testing and evaluating LPI performance of a data link. By adopting the method disclosed by the invention, the strength of radio signals that are transmitted externally can be reduced, the radiation characteristics can be optimized, and the anti-interception capability of test equipment can be improved. The method is implemented through the following technical schemes: in a microwave anechoic chamber environment, a data link antenna 1 and a data link antenna 2 complete a data link communication function, and a microwave antenna completes the detection of a communication signal of the data link antenna 1, and simultaneously eliminates an interference signal of the data link antenna 2; a scenario driving system of an industrial control computer sets a value that meets a power control range and stepping requirements of the data link, and automatically simulates discrete track points and continuous track segments; and an analysis and evaluation system ofthe industrial control c