The invention relates to a double-opening-ring steel pipe pole applied to a power transmission and substation line. The double-opening-ring steel pipe pole comprises a vertical main pipe and a plurality of horizontal cross arms, one end of each horizontal cross arm is connected to the main pipe. The cross arms are arranged at the different height positions of the main pipe. Each height position is provided with three cross arms, wherein two of the three cross arms are distributed on the two sides of the main pipe, the axes of the two cross arms share the same line, and the axis of the remaining cross arm is perpendicular to the other two cross arms so that the three cross arms can be distributed in the circumferential direction of the main pipe in a T shape. The double-opening-ring steel pipe pole is simple and concise in structure, attractive in appearance, small in occupied space and clear in force transmission and can be suitable for double-circuit line cut-off loop inlet situations; according to the double-opening-ring steel pipe pole, a two-foundation 90-degree corner pole tower is avoided and is replaced by a one-foundation pole tower, and the work amount of the pole tower and the foundation is reduced.