A self rotating deployed film solar battery array includes film solar batteries, electrical cables, a center axle and connecting lines. A plurality of long strip shaped film solar batteries radiate to form a circle or a polygon-array. Two adjacent film solar batteries are linked by connecting lines. Each film solar battery is linked to the center axle by electrical cables. The film solar batteries are deployed and maintained in an array shape by a self rotating centrifugal force in space. The film solar batteries are coiling outside the surface of the center axle before their deployment. The unit weight of a thin film battery is only 1/30 of a traditional solar cell paddle.