Smoothed Particle Hydrodynamics (SPH) is a popular technique for fluid simulation in computer graphics. With the increasing demand for applications of SPH fluid simulation technology, many research achievements have emerged in recent years, and the works include methods improving the algorithms of incompressibility, viscosity and surface tension, as well as strategies to enhance its efficiency and stability. In addition, some researchers focused on designing methods for complex scenarios and building a unified simulation framework to expand the application scope of SPH fluids. In this paper, the related works on SPH fluid simulation are summarized and discussed from the above aspects, and the future developments of the technology are prospected.