Aiming at the problems that the design standards of floating bollards in inland lock are different and the key parameters are not scientific and reasonable，the height of floating bollards and key parameters of pontoons are studied in this paper.The structural characteristics and application scope of several typical structural types of floating bollards are summarized by analyzing the design parameters of floating bollards and lock operating experience，and the value range of the mooring height of floating bollards that can be applied to various levels of lock is obtained，as well as the value basis of pontoon draft depth ratio，pontoon diameter and pontoon height.The research results can effectively guide the selection of key design parameters of lock floating bollards，which is of great significance for promoting the standardization and serial design of lock floating bollards.