One new high precision small satellite constellation laser communication simulation system is introduced

based on the demand of small satellite constellation laser communication between satellites. The system consists of two simulative satellites and a control center. The simulative satellite based on high precision triaxial flotation Turntable is comprised of satellite computer and diversified attitude sense organs and attitude executers on satellite. High precision triaxial flotation Turntable can afford the working environment for satellite

the satellite computer and the attitude sense organs and attitude executers manage to make the triaxial flotation Turntable get high pointing accuracy. The simulation system can work in many modes

including Master-Slave mode for double satellites

cooperative mode for double satellites

Master-Slave mode for three satellites

cooperative mode for three satellites and single satellite failure mode. The paper established coordinate for the system and bring forward mathematic model. At the end

the simulation is given

and the simulation can satisfy the demand of small satellite constellation laser communication.