Abstract: During the business commissioning process after upgrading to the double polarization, the antenna of the new generation of Meizhou weather radar usually pitches to the upper limit once about 15 days or so. This results in a failure phenomenon by showing elevation angle of 90° which causes radar run abnormally. In this paper, we analyze the possible causes of the multiple antenna pitching to upper limit by considering the working principles, signal flow and circuit schematic diagram of the radar. The maintenance process is also introduced in detail. Finally, the processing of common antenna pitching problem is analyzed and summarized.