In view of the problems of new energy accommodation and seasonal load supply pressure in a rural distribution network with extensive access to electric vehicles and new energy power generation，a joint regulation strategy is proposed which utilizes soft open points to achieve coordinated cooperation of flexible interconnection of transformers，orderly charging of electric vehicles，and rational economic expansion of transformer capacity，thereby ensuring seasonal load demand in renewable energy distribution networks while enhancing renewable energy accommodation capacity.Firstly，the usage and load characteristics of different transformer districts in rural areas under the background of renewable energy are analyzed.Secondly，the orderly charging model of electric vehicles，the transformer capacity evaluation system model，and the cooperative regulation operation model are established.Thirdly，the constructed nonlinear optimization model is transformed into a second-order cone programming model through convex relaxation and linearization methods.Finally，simulation experiments are carried out by using the improved 33-node distribution network，which confirms the practical rationality and effectiveness of the regulation strategy proposed in this paper.The research findings demonstrate that the proposed strategy can effectively improve the transformer utilization rate in rural areas and enhance the renewable energy accommodation capacity，as well as the seasonal load supply capacity when transformer capacity is insufficient.