The Yangtze Estuary Deepwater Channel is also known as the North Channel. The daily average ship flow exceeds hundreds. With the large-scale development of the shipbuilding industry, it is normal for the Super Large Oil Tanker (VLCC) to frequently enter and exit the Yangtze Estuary Deepwater Channel. Density, water depth, channel width and tidal water have great impact on the safety of super large oil tankers. Choosing the right traffic flow time period and tidal flow in and out is very important for the safety of super large oil tankers. The navigation safety of the deep water channel of the Yangtze River estuary is complicated, and the super large oil tanker enters and exits. The Yangtze River deep-water channel needs to meet the relevant safety characteristics. Based on the traffic flow, tide and ship maneuverability of the Yangtze Estuary deep-water channel, this paper uses the fuzzy synthetic evaluation method to analyze the safety of the super large tanker entering and leaving the Yangtze Estuary deep-water channel. The super large tanker must The Maritime Safety Administration is notified to enter the port in coordination to ensure the safety of ships and waterways [1].