The invention relates to a transformer compound partial discharge source simulation device which comprises a metal upper cover plate (1), transformer insulating oil (9), a grounding module (11) and ametal lower cover plate (12). The simulation device further comprises a high-voltage guide rod (7), an oil filling and draining hole plugging bolt (8), an organic glass cylinder (10), an oil paper tipdefect discharge module, an oil paper internal air gap defect discharge module and an oil paper surface defect discharge module; the metal upper cover plate (1) and the metal lower cover plate (12) are respectively and fixedly connected with the organic glass cylinder (10) to form an enclosed space for accommodating the transformer insulating oil (9); and the oil paper tip defect discharge module, the oil paper internal air gap defect discharge module and the oil paper surface defect discharge module can implement single defect discharge simulation or combined defect discharge simulation. Compared to the prior art, the transformer compound partial discharge source simulation device has the advantages of high practicality, convenience in mounting and debugging, simple structure, low cost and the like.