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In the process of low elevation tracking, the electromagnetic waves emitted by the flying target can propagate through different paths to reach the receiving end of the phased array system. Due to the different arrival times of the component fields, they superimpose on each other in their respective phases and cause interference, resulting in the phased array antenna being unable to accurately obtain the angular information of the target through the traditional single-pulse angle measurement technique. In order to eliminate the influence of multipath effect on the low elevation tracking performance of the system, an improved single-pulse angle measurement technique is proposed in this paper. The method utilizes the phase jump of adjacent pulse difference beams to construct a symmetrical beam and adopts frequency diversity technology. A series of operations on the sum-difference beams obtained at different operating frequencies have been performed to accurately obtain the angular information of the target and the mirror target, and the angular error of the single-pulse system in a specific environment has been reduced from the previous about 1 degree to less than 0.1 degree. The application of improved single-pulse goniometry allows the tracking performance of the system in a multipath environment to be significantly improved, and the lower computational complexity makes it easier to implement and therefore of good engineering utility.