Abstract:With the increasing frequency and intensity of maritime operations and the frequent occurrence of maritime safety accidents, deep-sea salvage and rescue will become increasingly important. Taking the U.S. F-35C fighter crashed in the South China Sea as an example, the paper sorts out in detail the deep-sea salvage related technologies and procedures, focuses on the marine environmental factors that affect deep-sea salvage operations, then uses operational ocean products to compare and analyze the similarities and differences of marine environment parameters in three different times when F-35 fighter planes crashed into the sea. Suggestions are put forward to strengthen our country's ability to carry out deep-sea salvage missions.