The utility model discloses a heating device for when being used for on - -spot thermal technology of glass curtain wall to test, including registration arm, control tube, locking mechanism, chuck, rotational positioning axle, heating cabinet and support the foot rest, the equal vertical setting of registration arm and control tube, locking mechanism with support the foot rest and connect both ends about the registration arm respectively, just be fixed in the registration arm through locking mechanism in the control tube lower extreme embedding registration arm on. The chuck is fixed in the control tube upper end, and the chuck comprises the clamping piece of two horizontal settings, heating cabinet one side from the region between two clamping pieces of two clamping piece opening side embeddings to pass two clamping pieces and the heating cabinet is fixed on the chuck through the rotational positioning axle. The heating cabinet imbeds the opposite side opening of regional side between two clamping pieces relatively, and installs the hot plate in the heating cabinet. The utility model has the advantages that the whole structure is simple it is single, be convenient for realize, it is with low costs, the utility model discloses carry out height and angle modulation simple operation to glass curtain wall when heating, labour saving and time saving, the facilitate promotion is used.