Rammed　earth　building　has　wide　prospects　of　exploitation　and　utilization　in　certain　fields　because　of　its　advantages　of　saving　water　and　energy,　but　the　research　on　the　technics　concerning　declines,　hence　restricting　its　diffusion.　Based　on　the　review　of　revolution　history　and　contemporary　practice,　it　is　brought　up　that　there　is　a　need　to　carry　on　the　optimization　research　of　rammed　earth　wall　with　modern　technology　from　its　prescription　and　mix　proportion,　additive　and　construction　tools,　etc,　so　as　to　gain　its　reactivation　and　promotion　of　low-tech　green　buildings.