Abstract:L-band radar has been putting into business operation at the national high-altitude meteorological detection station, which can give a full play to the performance of the L-band radar, guarantee normal high-altitude meteorological observation and extend the service life of the radar.Based on the working principle of L-band radar, combined with itself working practice on the maintenance of high-altitude meteorological radar for many years, the maintenance method, content and the matters needing attention in the use process of L-band radar are introduced.Some references are provided for the radar technical support personnel in the base station.