The invention relates to a double-loop overhead power transmission line cable breaking strain tower adopting a K-shaped cross arm. The double-loop overhead power transmission line cable breaking strain tower comprises a tower body, a ground wire cross arm on a top layer, a wire cross arm on an upper layer, a wire cross arm on a middle layer, a wire cross arm on a lower layer, an auxiliary cross arm on a bottom layer and a cable suspension bracket, wherein each of the ground wire cross arm on the top layer, the wire cross arm on the upper layer, the wire cross arm on the middle layer, the wire cross arm on the lower layer and the auxiliary cross arm on the bottom layer adopts a two-section type structure; and the cross arm on each layer is arranged in the shape of K, and the cross arm on each layer is consistent in the vertical direction. The double-loop overhead power transmission line cable breaking strain tower only needs to adopt a one-base double-loop cable breaking tower to realize cable breaking, so that construction cost is relatively low and floor space is relatively small; and moreover, the original circuit arrangement mode is not changed, and the double-loop overhead power transmission line cable breaking strain tower is suitable for double-loop overhead power transmission line cable single-side or double-side breaking, and is suitable for being constructed near a linear tower.