We propose a simulation and test platform for free-space quantum communication. The platform is used to simulate the
working condition of the satellite-to-ground quantum communication, test the technical parameters and performance of
the quantum communication terminal. A collimator is used to simulate the far-field optical transmission between the
satellite and the ground; A turntable is used to simulate the motion between the satellite and the ground; A voice coil
motor fast steering mirror is used to simulate the vibration of the satellite. With this platform, we design experiments to
test the quantum communication terminal we developed. Its acquisition, tracking and pointing (ATP) performance and
the far-field distribution of the communication photons are tested, the test results are provided and analyzed.