The invention discloses a dynamic capacity expanding daily operation strategy based on F5 server nodes, comprising the following steps: obtaining data; calling eight indexes of an evaluation system; adding the scoring results for the eight indexes to a database; calculating the total evaluation score by the same-level information system; when the total evaluation score is above or equal to eighty, starting the dynamic capacity reduction; when the total evaluation score is below eighty, starting the capacity expanding; when the dynamic capacity reduction is started, automatically deleting the backup nodes by the system; and when the dynamic capacity expanding is started, automatically adding the backup nodes by the system. According to the invention, proper resource allocation can be completed for F5 server nodes, which can steer clear of risks in advance, liberate human resources and realize automation.