Using the Abaqus numerical simulation method, the submarine cable-seabed numerical model is established, and the influence of the terrain curvature radius on the static stress characteristics of the submarine cable is analyzed. The results show that: the stress concentration of the cable occurs at the top of the trapezoidal seabed slope, and under the same curvature radius, the cable stress at the top of the trapezoidal seabed slope is much greater than that at the slope toe, which means under the same curvature radius, the cable stress at the ridge is greater than that at the trench; as the curvature radius increases, the cable stress at the top of the slope is significantly reduced, and there is no significant change in the cable stress at other locations. The research results can provide theoretical support for submarine cable laying facilities.