The utility model discloses an umbellate form combined material cross arm tower, including tower leg, body of the tower and the tower head who connects in order, still is the king's style of calligraphy and iron tower axis symmetric distribution in the body of the tower left and right sides including six groups that set up to the side of the body of the tower by the combined material cross arm that draws insulator and post insulators to constitute to one side, six group's cross arms, the every combined material of group cross arm contains two and draws insulator and two post insulators and steel to hang the some device to one side, the one end of drawing the insulator to one side with the body of the tower is connected, the other end with post insulators's one end is connected, post insulators's the other end with the body of the tower is connected, and its tie point is located draw to one side the insulator with the below of body of the tower tie point, post insulators with the one end of drawing the insulator to connect to one side is equipped with steel string some device for the connection. Guaranteeing under the prerequisite of wire to the ground distance, the utility model provides a tower structure has reduced the tower height, has reduced the line corridor width to reduce shaft tower tower weight and foundation.