本文描述了探地雷达系统的设计、研制、物理模拟及其实测结果。该系统采用大功率、可变发射脉宽的发送电路，高灵敏度、宽带的接收电路，能实现快速、动态、高分辨率的采集和成像。通过对常见探测对象的物理模拟和实地现场测试，验证了仪器的探测性能，说明了整机具有功率大、探测能力强、分辨率高、系统一致性好和高速成像处理等特点。 This article describes the design, development, physical simulation and results of GPR systems. The system uses high power, variable transmit pulse width of the transmission circuit, high sensitivity, wideband receiver circuit, enabling fast, dynamic, high resolution acquisition and imaging. Through the physical simulation of the common detection object and the field test, the detection performance of the instrument is verified, and the characteristics of the whole machine such as large power, strong detection capability, high resolution, good system consistency and high-speed imaging processing are demonstrated.