The utility model discloses an intelligent antenna calibration network, which comprises a power distribution network module and a plurality of directional couplers, the directional coupler is used forbeing connected between the intelligent antenna port and the antenna array; a merging port of the power distribution network module is connected with calibration equipment, and each branch port is connected with one end of each directional coupler in a one-to-one correspondence manner; wherein the directional coupler comprises a first non-linear coupling arm and a second non-linear coupling arm;the first non-linear coupling arm is coupled with the second non-linear coupling arm; one end of the first nonlinear coupling arm is connected with a branch port of the power distribution network module; one end of the second nonlinear coupling arm is used for connecting an intelligent antenna port, and the other end is used for connecting an antenna array. By adopting a non-linear coupling structure, the effective coupling length of the directional coupler is increased, the average phase velocity of odd modes of the coupling microstrip line is reduced, the phase velocity of even modes is still propagated along a straight line, the phase velocity difference between odd modes and even modes is reduced, the phase velocities of the odd modes and the even modes are similar, and thus the directionality is improved.