Data transmission and precise distance measurement are necessary to high precision orbit determination and time synchronization in navigation satellite system. The abilities of anti-interference, confidentiality and antiinterception are improved by laser transmitting data and ranging in inter-satellite. Also the ability of autonomous navigation is improved significantly. Taken the inter-satellite link characteristics, laser communication and ranging into comprehensive consideration, a kind of integration system is proposed by combination of coherent detection and data frame ranging. System principle and working process are given. According to the actual navigation satellite constellation, link characteristics such as available probability, link distance, doppler frequency shift are studied via STK software. Also link power is calculated when link distance and the parameters of optical system are given. It is used to design the laser communication and ranging integration system.