The invention discloses a double-cross-shaped composite fabric membrane double-axis tensile strength test piece. The test piece comprises a center core area and four cantilevers extending outsides around the center core area to form a cross shape, each cantilever is connected to the center core area through an edge transition area, the end of each cantilever is a clamping section provided with a clamping end rubber rod, and the clamping end rubber rod is used for connecting a clamp of a double-axis tensile test machine; the clamping section is divided into three layers, each cantilever and the edge transition area have double layers, the center core area has a single layer, and the edge transition area is a quadrangle of which four angles have fillets. The invention further provides a manufacturing method of the test piece. The double-cross-shaped composite fabric membrane double-axis tensile strength test piece can test and represent the fabric membrane double-axis tensile strength, destruction happens at the single-layer test area, the cantilevers and edge transition areas are strengthened and later destructed, and the test piece can be applied to building membrane, airship envelops, other industrial fabric fields and the like.