The utility model discloses a double-circuit single circuit cutoff power transmission steel pipe pole in a Y-shaped cross arm arrangement, and relates to the technical field of high-voltage power transmission lines. The double-circuit single circuit cutoff power transmission steel pipe pole comprises a pole body, a guide wire cross arm and cutoff cross arms, wherein the guide wire cross arm is arranged on side of a tower body and is vertical to the line direction; the other side of the tower body is provided with two groups of cutoff cross arms; an included angle between the two groups of cutoff cross arms is of 90 degrees; the guide cross arm and two groups of cutoff cross arms are in the Y-shaped arrangement. Through the double-circuit single circuit cutoff power transmission steel pipe pole in the Y-shaped cross arm arrangement, the problem that the position of a cutoff pole tower is limited on the central line of an original line; a 1-based double-circuit strain power pole is omitted; the engineering investment is reduced; the cutoff side span length is increased; the utilization rate of the using conditions of a pole tower is improved, so that the engineering investment is lowered.