Abstract: The article focuses on the structure study of subsea production system in PY35-1/35-2 gas field. In the basic design, the foundation type is studied first, and the appropriate foundation type is selected by comparing. In the design, the relevant department data needed to pay attention is introduced. The fishing load is considered in the basic design of PY35-1/35-2 gas field, because of less the fishing gear interaction data in this field, NORSOK recommended data is considered, and this has a big effect the structure design. The structure design method of the subsea production system is introduced in this paper.