Abstract:  In the construction of offshore oil platform, the precise positioning of cable laying route and material control is always a big challenge. To slove this problem, we can realize the cable precut on the basis of accurate calculation of cable laying route and construction length in three-dimensional (3D) model. By making secondary development based on the principle of the nodes of the cable path and PDMS, we develop the cable laying route optimization software. It uses the efficient algorithm at key nodes to make automatic cable layout, so that we can accurately calculate the cable length, effectively improve the cable route laying efficiency and save the cable material cost.