The invention relates to a three-freedom-degree light-load aerial photograph stabilized platform, and belongs to the technical field of aerial remote sensing. The stabilized platform includes an outerframe (1), a rolling frame (2), a pitching frame (3), a yaw frame (4), a first drive motor (5), a second drive motor, a third drive motor (6), an encoder (7), a three-shaft inertial measurement unit(8), a mechanical locking mechanism (9, 10, 11), and a controller. A center of mass is designed, rotation shafts of the rolling frame and the pitching frame are aligned with the center of mass of a load, additional interference force generated by circular motion of an optical load is applied to a bearing completely, the additional moment is reduced to the greatest extent, the load of the motors and the size and the mass of the corresponding component can be reduced greatly, the anti-impact ability of the stabilized platform is improved, and the stabilizing precision of the stabilized platformis improved.