Abstract:  HYSY201 has the ability to lay deepwater pipelines. Based on the characteristics of deepwater pipeline and pipeline in-line structure installation, we introduce the HYSY201 stinger roller boxes optimization design method and ideas. The stinger tail roller box is designed in a V shape instead of the traditional U shape. The pipeline in-line structure's slings and shackles can pass through the roller boxes effortlessly because of the modified roller boxes on the stinger. These designs can effectively reduce the risk of deepwater pipeline and pipeline in-line structure damage, also they have very good application during HYSY201 installation of deepwater pipeline and deepwater pipeline in-line structure.