为了解决非金属管线各项参数对探地雷达响应的影响，得出影响探地雷达响应的因素。结合有限时域差分方法和矢量分量有限差分方法建立了一种正演模型。利用电磁波模拟软件GPRMax3.0，模拟了大量实际情况，并采用不同的天线主频对不同管线的形态，材质，埋深等进行探测。利用该模型模拟了非金属管线的不同参数对雷达响应的影响，其中管径对回波强度有决定性影响，模拟结果与实际情况一致，证明了该模型的有效性。

In order to address the impact of various parameters of non-metallic pipelines on the response of ground penetrating radar, the factors that affect the response of ground penetrating radar are identified. A forward model was established by combining the finite time domain difference method and the vector component finite difference method. Using the electromagnetic wave simulation software GPRMax3.0, a large number of practical situations were simulated, and different antenna frequencies were used to detect the shape, material, burial depth, and other characteristics of different pipelines. The influence of different parameters of non-metallic pipelines on radar response was simulated using this model, where the diameter of the pipeline has a decisive impact on the echo intensity. The simulation results are consistent with the actual situation, proving the effectiveness of this model.