An introduction to the structure and working principle of a novel rotatingspool hydraulic valve is provided, and a theoretical force analysis of the spool under the low pressure working conditions is carried out. The ANSYS software was used to conduct a theoretical Computational Fluid Dynamics (CFD) analysis on the spool, and the characteristics of the internal flow field under the low pressure working condition were obtained. The working torque of the spool was calculated in theory. The working torque of the spool, in the varying degrees of the opening and pressure, from the experiments with the lowpressure working conditions further verified the results of the CFD analysis.The results from this rotational torque analysis demonstrate that this novel rotatingspool hydraulic valve is advantageous in having a simple and robust structure, small rotational torque, and high control accuracy under the lowpressure working conditions.Nicety control of the valve opening can be achieved to meet the practical needs of the hydraulic system when a appropriate motor and the control methods are selected.