The invention discloses a self-locking type hinge and a cubic star battery array adopting the self-locking type hinge. The self-locking type hinge comprises a body inserting panel fixing part, unfolding array fixing parts, a positioning shaft, screws, locking pieces, a torsional spring, positioning pins, springs and limiting protrusions. Under drive of torsional spring force, the unfolding array fixing parts rotate around the body inserting panel fixing parts, and when the unfolding array fixing parts are unfolded to the set angle, the springs pop the positioning pins into blind holes from through holes so as to achieve the positioning effect; the cubic star battery array adopts the hinge of the type, and the battery array comprises 3P battery plates and a plurality of self-locking type hinges, wherein the P is equal to 1, 2, 3 and the like, the battery plates are equally divided into three rows, and the rows are connected through the hinges; the hinge connecting the first row of battery plates and the second row of battery plates and the hinge connecting the second row of battery plates and the third row of battery plates are located on the two faces of the battery plates, and the column of the second row and another columns are connected through the hinges; and the hinges on the adjacent columns are located on the two faces of the battery plates; and the self-locking type hinge and the cubic star battery array are small in size, small in mass, high in adaptation, good in transportability and large in unfolding area.