Mixed-voltage four-loop narrow-base steel tube tower with underground upper-layer cable

A mixed-voltage four-loop narrow-base steel tube tower with an underground upper-layer cable comprises a tower head, a tower body and a cable platform, the tower head comprises an upper-end 220kV tower head and a lower-end 110kV tower head, the upper-end 220kV tower head comprises a cross arm, the cross arm is provided with a ground wire hanging point and a 220kV wire hanging point, a drainage wire cross arm is arranged on the outer side of the cross arm, and the cable platform is arranged on the outer side of the drainage wire cross arm. The drainage wire cross arm and the cable platform are both provided with drainage wire strain string hanging points, an overhead power line of the 220kV tower head at the upper end reaches the cable platform through a drainage wire, and the cable platform is provided with a cable terminal and a lightning arrester installation base and is grounded through a cable. According to the utility model, the width of a path corridor can be compressed, when the overhead line cable is