In view of the long channel,offshore distance and the problem that a single tide station is difficult to control the real-time tide level of all construction sections for the 300,000-ton waterway phase II project waterway dredging construction project in Lianyungang Port LYG-302-H1.2 section,we carry out a systematic development & research.Using the original three tide stations for tidal level correction,and adopting Beidou information transmission system,we study the relevant software and obtain a set of long-distance tide level real-time broadcast system suitable for the project.The comparison between the field-measured data and the data calculated by the corresponding base station shows that the system can be used in the project.This system is connected to the ship dredging system to provide real-time tide data for the construction ship,and the construction ship completes the ship's definite depth on this basis,which plays an important role in the quality control of the project.