The utility model relates to a transmission line shaft tower field can produce certain error during with the anchor screw installation to result in the from zero error rag bolt flange joint structure of rectifying that can't provide with the shaft tower on correct angle installation upper portion to present shaft tower. Including last ring flange, steel tube components, lower flange dish, processing has the lower flange dish trompil that supplies rag bolt to pass on the lower flange dish, and the trompil of lower flange dish is arc -shaped slot hole, and ring flange trompil on processing has on last ring flange is gone up the ring flange trompil and is arc -shaped slot hole. The central point that goes up the ring flange trompil puts the orthographic projection with last ring flange line of centres, and the central point of lower flange dish trompil puts the orthographic projection with lower flange dish line of centres to is contained angle between the two last projections 15 45 between the degree. The utility model discloses the ring flange trompil dislocation design of ring flange about utilizing, and the dislocation of the mounting hole on shaft tower design can realize that full azimuth angle adjusts, make the angle installation of shaft tower and predetermine to reach the almost function of zero error.