In order to improve the monitoring and early warning ability of local strong convective weather under complex terrain conditions in mountainous areas, and effectively reduce the measurement error of precipitation target echoes between weather radars, Guiyang Doppler Weather Radar Station is used as a benchmark. The radar echo intensity of strong convective weather was compared and analyzed by selecting the data of simultaneous observations of Guiyang, Bijie and Zunyi Doppler weather radar. The preliminary analysis results show that the echo intensity observed between Guiyang and Zunyi and Bijie radar has consistent fluctuation characteristics and has a large correlation. The echo intensity of Guiyang radar observation is generally lower than that of Bijie and Zunyi radar observation data. The influence of radar composite reflectivity factor jigsaw on monitoring and warning range of strong convective weather in mountainous area of Guizhou province is small.