The invention discloses an unbalanced force testing method for curve beam bridge swiveling construction of a high-speed railway. The method comprises: step one, preparation before testing is carried out; to be specific, a jack is installed and a displacement meter is arranged; step two, weighing testing is carried out; to be specific, after a temporary support is cut off, the jacking force of thejack is adjusted; when the read number of the displacement meter changes suddenly, the bending moment generated by the jacking force of the jack, the unbalanced torque of a swiveling body, a spherical-hinge friction moment of the swiveling body reach instantaneous balancing and the unbalanced torque of the swiveling body and the spherical-hinge friction moment of the swiveling body are calculated;and step three, a load and displacement curve is drawn and a spherical-hinge friction coefficient and an eccentric distance of the swiveling body are calculated. According to the invention, on the basis of the unbalancing weighing field testing of the swiveling body, the structure safety of the swiveling body construction stage is ensured and the construction quality is improved. Meanwhile, the experience and data are gathered for the design and construction of the similar swiveling bridges; and the basis is provided for technical management and technical assessment during the operation periods of bridges.