The invention provides an EIRP plane near-field test method based on a large high-frequency satellite system. The method comprises the following steps: a step 1, ground calibration of excitation source signal power is performed; a step 2, a distance between a receiving probe and a transmitting antenna is adjusted according to a test frequency band; a step 3, after a satellite is powered on, a digital tube subsystem and a transmitter are powered up normally; a step 4, a ground excitation source is accessed to a standard antenna of a corresponding frequency band on the ground, and the receivingprobe is used to complete scanning for the standard antenna; and a step 5, EIRP is calculated through a combination with back-off power according to a satellite antenna scanning result and a standardgain antenna scanning result. A high requirement of an antenna system having the large antenna size and high frequency for a far field test site is effectively satisfied, a threat, caused by externalfield environment, to the satellite system is effectively solved, and a test can be completed in a plane shrinkage field. Possible hazard to the transmitter caused by the test can be prevented at thesame time, and a whole-satellite EIRP test of the satellite system can be effectively solved.