The invention discloses an insulation paper aging test device for a power transformer, belonging to the technical field of power systems. The device comprises a body, an insulation paper bracket arranged on the body, an oil tank and a temperature control device, wherein transformer oil is contained in the oil tank; a sampling opening and an inlet through which the insulation paper bracket stretches into the oil tank are formed in the upper part of the oil tank; multiple heating temperature control points are uniformly distributed on the outer surface of the insulation paper bracket; the heating temperature control points comprise ceramic chips, resistive heaters and metal heat-conducting fins used for simulating a conductive coil of the transformer; the ceramic chips are uniformly distributed on the outer surface of the insulation paper bracket; resistive heaters are arranged between the ceramic chips and the metal heat-conducting fins and are connected with a temperature control device through wires; and insulation paper coating the insulation paper bracket is arranged on the outer surface of the metal heat-conducting fins. According to the device disclosed by the invention, continuous electric sampling of the transformer oil can be realized, online observation and detection can be realized, and a mathematic relation between the insulation paper aging degree and the content of dissoluble aging products is conveniently analyzed. Moreover, the temperature can be independently controlled by the heating temperature control points, and the temperature control precision is high.