Abstract: The phase change heat storage model with rib rotation was established. The heat storage characteristics of the model at different speeds were studied by numerical simulation,and the corresponding thermal analysis was carried out by field synergy theory.The results shown that the ribbing and rotation can significantly improve the heat storage effect of the phase change thermal storage unit and shorten the heat storage time,the field synergy angle of the heat storage process can be reduced by increasing the rotation speed,but the excessively high lifting speed will increase the coordination angle. Reduce the synergy between flow and heat transfer. From the perspective of energy saving and field synergy,it is not advisable to increase the speed too high,and the speed control is optimal in the range of 0.1-0.3 r/min.