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An adaptive time-step approach is proposed to perform real-time particle fluid simulation. In traditional adaptive approaches, the iterative process of each element updating is limited to the minimum and fixed time step, which results in the computational resources wasting. This paper solved such a problem by adjusting the element updating periodicity with its reachable time step. And a common Distance Fields method is presented to transform arbitrary meshes and particle models for fluid modeling and rigid body modeling, which provides the basis for interaction of fluid. Experiments proved the proposed method feasible and efficiency.