The invention discloses a rotating mechanism for tubular column angle adjustment of an electric steering gear of an automobile. The rotating mechanism comprises tubular steering columns, fixing gaskets and two bolts. The two bolts are matched with threaded holes of two installation sleeves correspondingly. A cylinder is arranged on the right side face of each annular flat pad, and the outer peripheral face of the cylinder is in clearance fit with the inner hole wall of the corresponding tubular column. The outer peripheral face of a small-diameter pipe of each fixing gasket is in contact with the hole wall of the corresponding tubular column. The annular face at the left end of a large-diameter stepped body of each fixing gasket is in contact with the annular end face on the right side of the corresponding tubular column. The small-diameter peripheral face of each installation sleeve is in interference fit with the hole wall of the corresponding fixing gasket. The annular end face of the left side of a large-diameter convex stepped body at the right end of each installation sleeve is in contact with the annular end face of the right side of the large-diameter stepped body of the corresponding fixing gasket. The bolts penetrate through automotive suspension holes and flat pad holes and are matched with the threaded holes of the installation sleeves. The rotating mechanism has the remarkable advantage that no abnormal sound is generated.