The utility model provides a flue gas particles sampling system heating device for precut ware, striking sample thief to flue gas particles sampling system heat, heating device include: heating jacket, fixed bolster, the fixed bolster sets up in the heating jacket, the precut ware, the striking sample thief set up in the fixed bolster. The problem of current heating device a plurality of to add heat pack heating effects relatively poor is solved, greatly improved the convenience of system, improved system stability and save installation time.