The invention provides a spacecraft flying-around approach motion simulator which comprises a testing platform, a target spacecraft motion simulating device and a tracking spacecraft motion simulating device. The spacecraft flying-around approach motion simulator has the advantages that vivid simulation of the respective absolution attitude motion and the relative position motion of a tracking spacecraft and a target spacecraft during orbital flying-around approach, and the defect that an existing linear guide rail type spacecraft motion simulator cannot vividly simulating the orbital flying-around approach of the tracking spacecraft and the target spacecraft is overcome. Compared with an air floatation type spacecraft motion simulator, the spacecraft flying-around approach motion simulator is simple in preparation, high in environment interference resistance, controllable in simulation time, capable of precisely restoring the simulation process, and the like.