Abstract: There is an obvious bending-torsion coupling effect during the cantilever construction of a continuous beam bridge with a small radius curve. A temporary locking structure must be installed at the middle pier support to overcome the adverse effects of the unbalanced state and ensure the safety of the construction process. Due to the lack of a reliable temporary lock design check calculation method, the project often uses the combination of the steel tube concrete temporary support pier and the temporary support at the top of the pier to set the temporary lock. Although the safety reserve is sufficient, the cost is high and the construction is difficult. For the purpose of simplifying the temporary locking structure, through in-depth research on the failure mechanism of temporary locking, a practical method suitable for the temporary locking design check calculation of the small radius curved beam bridge body is proposed. It is discussed in detail and demonstrated in conjunction with the refined finite element model. The research results show that the locking design calculation method proposed in this paper has a certain practicability, and has certain reference value for the temporary locking design of continuous beam bridges with small radius curves.