At present, the waste gas treatment device of offshore oil production platform is mainly torch tower and torch tower cylinder. These devices work in extremely bad environment and have high requirements on the structural strength design of the device. In this thesis, aiming at the strength design problem of soaring structure component of torch tube, the static analysis of single torch tower and multiple torch tower of waste gas treatment device on an offshore platform is carried out by using the static module of ANSYS software, and the structural stress and deformation values generated under different working conditions are obtained. The results show that the maximum pressure load of single torch tower tube is larger than that of three torch tower tubes. The analysis method and results in this paper have a certain guiding significance for the design and installation of petrochemical waste gas treatment device.