The invention relates to an oil immersed inverted current transformer partial discharge detection system. The oil immersed inverted current transformer partial discharge detection system is characterized in that the oil immersed inverted current transformer partial discharge detection system comprises two pulse current signal detection units (2) which are installed on the two sides of a primary wiring terminal of a transformer respectively, and the output ends of the two pulse current signal detection units (2) are connected with the input end of a partial discharge detector (4) through optical fibers (3). The oil immersed inverted current transformer partial discharge detection system has the advantages that after the oil immersed inverted current transformer partial discharge detection system is used, and interference signals which may occur in the partial discharge measurement process can be separated thoroughly so that whether partial discharge exists in the transformer or not can be judged timely and effectively; defect types are judged according to partial discharge characteristics, so that the basis for timely equipment maintenance strategy making is provided, and therefore the equipment safe operation level can be improved greatly.