Embodiments of this application disclose a method and an apparatus for determining a broadcast beam weighted value in a wireless communications system. The method in the embodiments of this application includes: obtaining an angle path loss spectrum of a target cell at a current moment, where the angle path loss spectrum includes signal path loss values of a target base station in the target cell in a plurality of directions; determining a beam angle power spectrum based on the angle path loss spectrum, where the beam angle power spectrum includes signal transmit powers of the target base station in the plurality of directions, and in the beam angle power spectrum, a signal transmit power in a direction with a relatively large signal path loss value in the angle path loss spectrum is relatively large; determining a broadcast beam weighted value based on the beam angle power spectrum; and forming a target broadcast beam based on the broadcast beam weighted value.
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