The construction of hydraulic tunnels is complicated. In the current construction simulation calculations, excavation process is mostly considered without the data of lining and grouting process, so these simulations cannot reflect the complete construction process of the tunnel. The dynamic simulation of the constructions uses prefabricated animation which is based on the simulation results, so its implementation process is complicated. Furthermore, this model is not easy to modify, and the structural conditions such as the stability of surrounding rocks and anchors during the construction of the tunnel are difficult to determine intuitively. In view of these problems, the method of tunnel construction in combination with system simulation was adopted in this paper, the CYCLONE model of excavation, lining and grouting was used to get a more accurate schedule, and construction dynamic visualization based on BIM technology was implemented. Aiming at the coupling simulation of tunnel structural safety and schedule which is rarely involved at present, a structural safety simulation method based on mapping concept and feedback technology was proposed for tunnel construction. Based on the secondary development technology and database technology, the combination of VB.NET and PYTHON language was used to compile a simulation system of hydraulic tunnel construction. This system can provide an overall structural safety judgment based on construction progress and support engineers with better data output.