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Aiming at the requirement of building the space-ground integrative network in the future, the characteristic of the manned lunar network and a series of problems that will occur when the TCP/IP protocol suite is applied to the network are analyzed. To solve these problems, the idea of using Delay/Disruption Tolerant Network (DTN) to build the manned lunar network is proposed, as well as the protocol architecture of the network is designed. Finally, the performance of manned lunar network based on Delay/Disruption Tolerant Network technology is emulated by file-transfer experiments using the testbed. Besides, the parameter selection of Licklider Transmission Protocol (LTP) is analyzed theoretically, and the experimental results indicate that the improvements of 17540 Bytes/s, 4160 Bytes/s, and 47000 Bytes/s in effective throughput can be obtained with LTP segment size of 400 Bytes, compared with that with LTP segment size of 1400 Bytes, 800 Bytes, and 100 Bytes respectively at high bit error rate.