The invention provides a sub-conductor spacer and a configuration method thereof. The sub-conductor spacer comprises two triangle frames, cross-shaped liners, a cable clamp body, a cable clamp press plate and a hinge pin, wherein the two triangle frames are vertically stacked and fixedly connected via the cross-shaped liners, the end part of each corner of the triangle fame is rotationally connected with the cable clamp body via the corresponding cross-shaped liner; and the cable clamp press plate is connected with the cable clamp body via the hinge pin, and the arc-shaped part of the cable clamp press plate is matched with the arc-shaped part of the cable clamp body to form a wire hole through which a wire passes. The sub-conductor spacer adopts the triangle frames as a main body, and is lighter in weigh, and more beneficial to suppressing occurrence of circuit waving.