Abstract: The simulation of elastic deformation is an important research topic in computer animation. However, it is always a big challenge to improve the computational efficiency while ensuring the reality. This paper presents a multi-precision hybrid model to simulate the elastic deformation and interaction efficiently. The model divides the computational space into physical deformation area and geometric deformation area according to user-defined ratio, and realizes the stable coupling of two different areas by the hybrid processing of computation nodes at the interface. A virtual node cutting method is used to stably and smoothly cut the physical deformation area, and an adaptive boundary particle sampling method is proposed to simulate stable fluid-solid coupling. The results demonstrate that the proposed model can control the efficiency and precision of the elastic deformation by adjusting the user-defined ratio, and satisfy the requirements of stability and efficiency in the virtual reality interaction and fluid-solid coupling.