The invention discloses a spontaneous polarization performance testing device for tourmaline powder materials, and relates to a device for testing the electromagnetic performance of a material. The testing device is mainly composed of a sample chamber, a temperature-measuring temperature controller, a signal detector and a data processor, wherein the sample chamber comprises a shielding shell, an insulation sample cell, a heating element, a signal picking electrode, a signal picking electrode interface and a temperature-measuring element; a temperature-measuring outgoing line is used for connecting the temperature-measuring element and the temperature-measuring temperature controller, and the temperature-measuring temperature controller is connected with the heating element through a heating control line; and an electrode outgoing line is used for connecting the signal picking electrode and the signal detector from the signal picking electrode interface, and the signal detector is connected with the data processor through a wire. in a precision constant temperature condition, the device can carry out charge integral amplification on collected polarization charge by a pole plate so as to the spontaneous polarization performance parameter of a tested sample and the defect of inaccurate test result in the prior art is overcome.