The invention provides a fluxgate self-centering positioning clamping device. The fluxgate self-centering positioning clamping device comprises a base, a magnetic head clamping part, a locking elasticbushing and a screw-in screw-out assembly, the base is provided with a magnetic head accommodating part, the magnetic head accommodating part is used for accommodating a magnetic head of the fluxgate; the magnetic head clamping part is used for fixing the magnetic head on the base, so that the sensitive center of the magnetic head coincides with the center of the test equipment; the outer side ofthe base is sleeved with the locking elastic bushing; the screw-in screw-out assembly is movably arranged in the test equipment; the screw-in screw-out assembly is used for realizing fixation betweenthe base and the test equipment, in the test process of the fluxgate, the base is arranged in the test equipment, the locking elastic bushing is matched with the inner wall of the test equipment, andthe screw-in screw-out assembly moves to a position between the locking elastic bushing and the base so as to fixedly arrange the base in the test equipment. By applying the technical scheme providedby the invention, the technical problem of low accuracy of the fluxgate test result in the prior art is solved.