The invention relates to a steel pipe and angle iron hybrid ultrahigh-voltage power transmission tower. The power transmission tower is shaped like a double-loop straight tower, and comprises a tower head, a tower body (6) and tower legs (7), which are sequentially connected; the tower head comprises earth wire supports (1), an upper crossarm (2), a middle crossarm (3), a lower crossarm (4) and a tower body column (5), wherein the upper crossarm (2), the middle crossarm (3) and the lower crossarm (4) are arranged from top to bottom, and are perpendicular to the tower body column (5) and symmetrical with the tower body column (5) as an axis, and the earth wire supports (1) are mounted on the end parts of both sides of the upper crossarm (2); the tower head is connected with the tower body (6) through steel pipe-to-angle iron transitional nodes (8); the tower head is made of angle iron members; and the tower body (6) and the tower legs (7) are made of steel pipe members. The invention has the advantages that not only can the bearing capacity of the original steel pipe tower body be kept unchanged, but also the usage of steel pipes is reduced, and the current problem of severe shortage in the capability of producing steel pipes for power transmission line construction in China can be effectively mitigated.