Space-ground video communication play an important role in manned space flight. According to the characteristics of communication link between spacecraft and ground communication station, an integrated space-ground video communication network is proposed based on IP over CCSDS, which is a gateway protocol conversion technology recommended by CCSDS. The proposed video communication network has been verified by both ground test and in-orbit test. Experimental results show that transmission rate of video communication is uniform and images are clear without jamming, no packet loss is occurred. Thus, the proposed network is suitable for the communication between low-orbit spacecraft and ground station, and can be used as a reference for manned moon landing and manned Mars landing.