Aiming at the problem of achieving refined sinking of accropode blocks under the condition of great water depth and complex flow in the Wangjiatan channel regulation project, a study on the force and motion characteristics during the hoisting and sinking process of the accropode group is carried out.Using a three-dimensional numerical simulation method, combining with the actual on-site operating conditions, a simulation model for the hoisting and sinking of the accropode group is constructed.The variation laws of the influence of factors such as wind speed, flow velocity, sinking speed, and sinking depth on key parameters such as drift distance, sling tension, and yaw angle are systematically analyzed.The results show that the flow velocity has a significant impact on the drift distance.As the flow velocity increases, the drift distance first increases, then decreases, and final increases again, with a maximum drift distance of 3.5 m.Due to the asymmetry of its own structure, the accropode group has uneven sinking forces and rotates continuously around the Z-axis during the sinking process.The flow velocity and sinking speed have a significant impact on this process.An increase in the sinking speed leads to an increase in the slamming load during sinking, resulting in severe fluctuations in the sling tension and seriously affecting the stability of the hoisting system.The research results can improve the sinking accuracy of accropode blocks under great water depth condition, effectively ensure construction safety, and provide technical reference and theoretical support for similar channel regulation projects.