As an important component of the power system, the reliable operation of air-core reactors is crucial. In response to the inherent defects in the structural design of traditional air-core reactors, this project proposed an electromagnetic design method for a new type of non-circulating current reactor with symmetrical spatial structure by changing the design concept of the reactor structure. This method ensured that the length of the wire wound in each package is exactly the same by winding it from multiple ends. The winding method is similar to that of a cake type transformer, but the calculation of inductance and loss is different from that of traditional reactors. This paper used this method to design a 10kV voltage level air-core reactor with a reactance rate of 6% and a rated capacity of 120kVar. And compared and analyzed the differences in reactor structure when using traditional equal temper-ature rise design method. The design of the new reactor reduces the total loss of the reactor by 7.5%, and the overall structural size of the reactor that can be designed is smaller, which is conducive to reducing production costs. The accuracy and effectiveness of the design method proposed in this paper have been further verified through type tests on the newly manufactured non-circulating current reactor.