In this paper, a stimulated analysis was performed on thermal and mechanical properties of the vertical sealing roller of the four column quadrilateral sealing packing machine with capacity of 80 bags/min. First, the structure model of the vertical sealing roller was established by SolidWorks. Secondly， static mechanic analyses on the shaft of the vertical sealing roller were done by Ansys in order to test the rationality of the design. Thirdly, the thermal conductivities of the roller were analyzed by the thermal part of Ansys. The maximum displacement of the shaft was 0.076 569 mm which satisfied the design requirement. The analysis results of the temperature and the thermal conductivities were close to the practical value. The analysis results matched those of experiments in hot sealing, indicating the design parameters were reasonable.