The invention relates to the technical field of constructional engineering, and discloses a fixing method of an embedded wire box. The method comprises the following steps: binding structural steel bars, wherein the structural steel bars comprise vertical main ribs and horizontal stirrups; connecting the positioning ribs with the horizontal stirrups; penetrating connecting ribs through the wire box, and connecting the two ends of the connecting ribs with the positioning ribs and the vertical main ribs respectively; and pouring concrete to form a building body. According to the fixing method for the embedded wire box, during fixing, the positioning ribs are connected with the horizontal stirrups, and the connecting ribs penetrate through the wire box and then are connected with the positioning ribs and the vertical main ribs, so that the wire box is fixed, accurate positioning of the wire box is guaranteed, the wire box and the structural steel bars are firmly fixed, and the wire box isprevented from deviating, deforming, inclining and the like. In addition, the method is simple and easy to operate, the risk of reworking and rectification is reduced, the loss of manpower and materials is reduced, and the working efficiency is improved.