Abstract: Shipborne radar is the main means for sensing naval battlefield situation and an important part of maritime combat force. Firstly, two outstanding characteristics of shipborne phased array radar are analyzed. Secondly, two common problems that are prone to occur in human-computer interaction design due to insufficient understanding of its characteristics are pointed out. Thirdly, three principles should be followed to improve human-computer interaction design of shipborne phased array radar are introduced. Finally, measures are given in the development of shipborne phased array radar to avoid problems such as low human-computer interaction, unclear requirements, non-standard processes, and insufficient verification.