Abstract: This work integrates Smooth Particle Hydrodynamics (SPH) simulations and analytical methods to study the sliding behavior of a droplet on a homogeneous inclinded surface. At first, based on the experimental data of a 3D droplet on the homogeneous inclinded surface we validate the accuracy of SPH simulations. Furthermore, we derive the analytical expression of the droplet velocity with respect to time using droplet friction equation, and it is verified by SPH simulations that the analytical expression holds for different combinations of solid, droplet and gas phases. Subsequently, we derive the analytical expression of the droplet sliding friction coefficient with respect to contact angle using the Voinov-Cox model and Furmidge-Kawasaki equation, and it is verified that the analytical expression holds for different combinations of droplet and gas phases. Based on these analytical expressions, we can predict droplet sliding friction coefficient and droplet velocity on different wall characteristics and reduce the workload of simulation and experimentation. This work has great potential significance for the theoretical research and experimental study of droplets.