根据机载雷达地杂波的形成原理及其特点，提出了一种基于波形综合的机载雷达地杂波建模方法。该方法产生的地杂波可以控制杂波的时域幅度起伏和功率谱，在时域和频域同时具有与实际雷达地杂波相近的分布特性，从而可为机载雷达系统的测试提供可靠的数据来源。The performance of airborne radar strongly depends on the statistical distribution, the power spectral character and the fluctuation of the ground clutter. This paper presents a clutter modeling method using waveform synthesis theory in order to provide ground clutter simulation for analyzing airborne radar system. Compared with conventional modeling method that uses the distribution and power spectrum of clutter, this method can generate ground clutter data with a given distribution, power spectrum and fluctuation simultaneously. Comparison of simulation results and real radar clutter indicates that this method can model ground clutter of airborne radar more accurate than the conventional method.