The invention discloses a composite-material rotating cross arm tower, which comprises tower legs, a tower body and a tower head, wherein the tower legs, the tower body and the tower head are connected in sequence; the composite-material rotating cross arm tower also comprises at least one group of combinational insulator cross arms which are arranged on the side surface of a pole tower, consist of cable-stayed insulators and supporting insulators and can deflect along a line direction; certain ends of the cable-stayed insulators are connected with the tower body; the other ends of the cable-stayed insulators are connected with certain ends of the supporting insulators; the other ends of the supporting insulators are connected with the tower body; connection points of the supporting insulators and the tower body are located below connection points of the cable-stayed insulators and the tower body. The supporting insulators are hinged to the tower body; the bending moment generated to the supporting insulators and the bending moment and the torque generated to the pole tower by the unbalanced tensile force of a conducting wire are eliminated; strength requirements on the supporting insulators and the pole tower are decreased; on the premise that the distance from the conducting wire to the ground is guaranteed, the tower height is decreased; the bending and torsion effects of the load of the conducting wire to the pole tower and the basic load of the pole tower are reduced.