The pendulous installation method (PIM) is a quick and convenient installation method specially designed for the installation of ultra-deep water and large weight manifolds. This is more suitable for the new generation underwater production systems. This article simulates the pendulous process of the function module with ADAMS software. The function module is simplified as a combination of a sphere and a cylinder. The cable model is approximately simulated in the form of a multi-segment small cylinder plus bushing force. The Morison formula is used to calculate the flow resistance. A multi-rigid-body dynamic simulation model by pendulous installation method was established. The validity of the model is verified by comparing the simulation results with other references. The effect of fluid velocity, gravity of the function module and cable length on the pendulous process is discussed. The research content of this paper can provide theoretical guidance for the engineering application of the function module of new generation underwater production systems.