Floating raft aquaculture is an important part of the coastal marine environment monitoring. In order to achieve the accurate monitoring on the range and area of floating raft, combined with on-site underway survey, adopt the high resolution SAR satellite remote sensing data to conduct floating raft aquaculture information extraction. Choosing Beidaihe and its adjacent fields as a key demonstration of floating raft aquaculture study, verify that the proposed method can quickly and accurately obtain the floating raft aquaculture range and area, which can provide a scientific basis for marine aquaculture regional planning, ecological pollution emissions and other applications.