The invention discloses an oil-immersed type split reactor. The oil-immersed type split reactor comprises a coil which is formed by a first winding and a second winding which are arranged coaxially, all envelopes of the first winding and all envelopes of the second winding are sequentially arranged in a crossed mode from inside to outside, the odd layers of the envelopes of the coil form the first winding, and the even layers of the envelopes of the coil form the second winding; the oil-immersed type split reactor further comprises a closed shell which is provided with an oil cavity used for containing transformer oil, and the coil is located in the oil cavity. According to the oil-immersed type split reactor, the transformer oil replaces air to serve as a magnetic flux medium, the insulating strength of the transformer oil is much higher than that of air, magnetic flux can be effectively reduced, and higher voltage can be borne. The transformer oil is high in specific heat, often serves as a cooling agent and is beneficial to heat dissipation of the coil.