Aiming at the problems such as the difficulty of continuous simulation data transfer of multi-hazard coupling effect in hydropower engineering and the lack of full-process sequential simulation tools, a hybrid simulation method of dynamic disaster chain transfer coupled with multiple numerical simulation tools and physics engine was proposed by considering the key nodes and parameters in the process of disaster chain transfer. The method adopts numerical simulation tools to obtain physical fields and damage patterns such as structural strength and deformation, maps the physical field variables and structural damage patterns into the physics engine through secondary development. The block movement, reservoir underflow, and flood evolution process after structural damage based on computational fluid dynamics and physics engine simulation methods in a mixed sequence are then simulated to realize the whole process of simulation for the transfer of the extreme dynamic disaster chain. The validation results of an extreme explosion damage accident in a gravity dam hub show that the method overcomes the limitations of single numerical simulation tool, realizes the integrated simulation preview from the structural response of the primary disaster to the whole process of the secondary disaster evolution, and achieves the more desirable effect in terms of precision and efficiency on the scale of engineering application.