[Introduction] Based on an offshore wind farm construction project in Qidong, Jiangsu Province, the numerical simulation study on mechanical characteristics of submarine cable during laying process was carried out and the local stress distribution of the suspension span of submarine cables under different trenching depths was analyzed. [Method] A numerical model of submarine cable laying based on ABAQUS numerical simulation software was established. [Result] Results show that the stress of the lifting point at the trailing edge of the submarine cable increases significantly during the burial process compared with that before the burial operation. This is the most dangerous position as the cable at this position has the largest stress during the whole burial process. The trenching depth has a significant effect on the stress at the lifting point at the trailing edge of the cable. With the increase of the trenching depth, the stress at the lifting point at the trailing edge increases correspondingly. [Conclusion] The selection of cable material at the lifting point should be protected in the cable laying operation, and the yield stress parameters of the cable should be mainly based on the stress analysis results of the cable in the burial operation. The research results can provide a reference for submarine cable laying operation
