The invention provides an aero-engine bearing pedestal complex component powder forming method, which aims to solve the internal defect problems that air holes appear and impurities are mingled in thecomplex component formed by the original casting process. The aero-engine bearing pedestal complex component powder forming method is characterized in that the required component is directly formed by a powder hot isostatic pressure forming process and then the size requirement of parts is met through subsequent machining. In the bearing pedestal complex structure component manufactured by the method, the size meets the design requirement, the tissue is uniform, the internal part does not have defects, the forge piece property level is achieved and the strength and the surface integrity of the parts are improved.