A method for testing a radio frequency parameter of an active antenna system, characterized in that the active antenna system is placed in a test cover for testing a radio frequency parameter, and wherein, the test cover comprises an antenna array part and a passive network part, and the antenna array part of the test cover is same with an antenna array part of the active antenna system; and the passive network part comprises a plurality of branch amplitude-phase controllers , a branch network and a combination network , a near-field coupling mode is formed between the test cover for testing and the active antenna system; the amplitude-phase controller is configured to: regulate an amplitude and a phase of a signal of every branch; the branch network is configured to: connect a signal to every branch respectively, to realize branch testing; and the combination network is configured to: connect signals of every branch, to realize combining testing, the method for testing comprises: calibration of the test cover, for calibrating a loss and a phase offset produced by the test cover, wherein the step of the calibration of the test cover comprises: an antenna array part calibration, for obtaining a gain of each antenna element and a combination gain of the antenna array; and a passive network part calibration, for obtaining an amplitude-phase calibration table of the test cover; near-field coupling calibration, for calibrating a near-field coupling test environment of the test cover by using two test covers on which the calibration of the test cover is performed; and testing a radio frequency parameter, for putting the active antenna system into the calibrated test cover, and the active antenna system and the calibrated test cover forming a near-field coupling mode, wherein, a test environment thereof is the same as a test environment of the near-field coupling calibration; testing a radio frequency parameter being performed on the active antenna system through a radio frequency test interface on the test cover after compensating the test environment by using a calibration result obtained from a calibration process, and obtaining a radio frequency parameter of a radio frequency port of the active antenna system. calibration of the test cover, for calibrating a loss and a phase offset produced by the test cover, wherein the step of the calibration of the test cover comprises: an antenna array part calibration, for obtaining a gain of each antenna element and a combination gain of the antenna array; and a passive network part calibration, for obtaining an amplitude-phase calibration table of the test cover; near-field coupling calibration, for calibrating a near-field coupling test environment of the test cover by using two test covers on which the calibration of the test cover is performed; and testing a radio frequency parameter, for putting the active antenna system into the calibrated test cover, and the active antenna system and the calibrated test cover forming a near-field coupling mode, wherein, a test environment thereof is the same as a test environment of the near-field coupling calibration; testing a radio frequency parameter being performed on the active antenna system through a radio frequency test interface on the test cover after compensating the test environment by using a calibration result obtained from a calibration process, and obtaining a radio frequency parameter of a radio frequency port of the active antenna system. <EOS>