The utility model discloses a traveling fixture used for loading a power take-off crossbeam welded piece of a mini fire fighting vehicle. The traveling fixture comprises an elongated pedestal, two clamping devices arranged at the two ends of the pedestal, two positioning pieces arranged on the upper surface of the pedestal and proximal to the two ends of the pedestal, and two positioning seats arranged close to the middle position of the pedestal. At least one vertical positioning plane is formed on each positioning piece. A positioning groove is also arranged on the positioning piece with the vertical positioning plane. Pin holes are formed on the positioning seats. The distance between the vertical positioning planes of the two positioning pieces matches for the distance between the inner walls of the two carriage girders. The distance between the pin holes on the positioning seats matches for the distance between the two mounting holes on the power take-off crossbeam welded piece. The traveling fixture greatly simplifies the manual operation procedure, reduces the labor intensity of the worker and ensures the mounting position and angle of the power take-off crossbeam welded piece.