Abstract：A reinforced earh retaining wall with height H = 31 m and four steps was builded in the main railway line of China firstly. In order to research the lateral deformation，basement pressure and lateral pressure of each wall，the testing study is made on the full-scale. It is disclosed that the lateral deformation of the low position is larger than that of the top position for each wall，the basement pressure of each wall is smaller than 100 kPa，and the lateral earth pressure with curve distribution is confirmed. The lateral earth pressure is constant basically for each wall because of the bench of 4 m behind wall. The test results can be used as a reference for future studies and designs of reinforced earth retaining wall.
