Abstract: Based on the studies of spacecraft on-orbit refueling, this paper discusses the ground simulation of spacecraft on-orbit refueling. The simulation systems developed in other countries are reviewed, with a special emphasis on a new ground simulation system. This system is mainly composed of a polished granite test bed, spacecraft simulators, video guidance system, control system on the ground, autonomous docking mechanism, and fluid transferring mechanism. It can not only demonstrate the whole experimentation process, but can also test the key technologies of on-orbit refueling, autonomous docking and separation, fluid transferring and controlling, and video guidance and thrust.