S-band digital array weather radar calibration system

The invention discloses an S-band digital array weather radar calibration system, which relates to the technical field of radars, and comprises a vertical channel and a horizontal channel, and further comprises a radio frequency relay I, a radio frequency relay II, an SP4T, an SP3T, a digital transceiving board, a multi-path amplifier and a two-way power divider, two paths of signals are transmitted to the two power dividers after being output from the multi-path amplifier, two circulators are in communication connection behind the two power dividers, loads are connected behind the two circulators respectively, one circulator is in communication connection with the first radio frequency relay, and the other circulator is in communication connection with the second radio frequency relay; according to the system, radar signals are received and transmitted and are received and processed by a radar, so that the system is completely equivalent to detection of a meteorological target, meteorological echo characteri