CATIA software was used to create three-dimensional model of the chimney. By finite element analysis workbench of the software, the lifting stress intensity and displacement of the chimney were checked. Q345-B steel，with yield strength of 345Mpa, was used for torch tower. When calculating, two states of the chimney were taken into account: horizontal and vertical position. The results show that in both states, the chimney itself, hanging ears all meet the material yield strength. So it need not modify the structure, the existing structure can meet the requirements of lifting.