The utility model relates to a phase-detecting special vehicle for a 10kV trolley switch, which comprises an insulation board, a chassis vehicle, a fixed plate, tongue plates, a linkage guide plate and a grounded copper sheet, and is characterized in that the lower part of the insulation board is fixedly connected with the chassis vehicle; a spiral track groove is formed in the middle of the chassis vehicle; a handle in the middle of the fixed plate is fixedly connected with a guide pole; the fixed plate is screwed into the spiral track groove through the guide pole to be movably connected with the chassis vehicle; two handle bars are fixedly connected with the front end of the fixed plate; two tongue plates are fixedly connected with the two sides of the fixed plate; the upper ends of the two sides of the chassis vehicle are connected with the linkage guide plate; and the grounded copper sheet are added at the bottom of the chassis vehicle; the handle can be shaken in or out; based on the mechanical linkage, a partition board valve can be opened for phase detecting, thereby ensuring that the partition board valve is not dropped off; and the possibility of electric shock is avoided, and the personnel safety of the staff is ensured.