The portable platform for radar field test and diagnosis is a new technical support platform consisting of the radar system equipment performance parameter testing, fault diagnosis, and maintenance support. The instrument integration, comprehensive detection of streamline, the development of application software and supporting tooling make the platform have capability of solving the problem such as lacking of test maintenance and diagnosis methods, reliance on manufacturers, the weak remote test and diagnosis guidance technology, the simple instruments equipped in stations, and so on. The portable platform has great significance to radar fault detection, test and analysis, maintenance, and guidance, which can give convenience to radar field test, maintenance, fault diagnosis, and rapid system recovery.