IN RESPONSE TO THE DEMAND FOR THE REINFORCED SOIL RETAINING WALLS IN THE CONFINED CONSTRUCTION SITE AND earthquake-prone areas, this study expounded the seismic damage phenomenon and wall deformation mode of the structure by carrying out the shaking table test of mechanically connected confined space reinforced soil retaining wall, and analyzed the mechanical behavior change characteristics such as acceleration response, panel displacement, reinforcement strain, and potential fracture surface. The results show that the acceleration amplification coefficient of the retaining wall increases with the increase of input frequency and is nonlinear along the wall height, and the maximum value is obtained at the top of the wall. The cumulative displacement of the retaining wall after the end of each working condition was 1.09%H, 1.28%H, 2.05%H and 10.96%H, respectively, and the retaining wall was moderately damaged after sin0.4g. The reinforcement strain increases with the increase of the input frequency and changes nonlinearly along the wall height. The potential fracture surface starts from the toe of the wall and develops along the contact surface between the filler and the slope. The mechanical connection behind the wall is a weak link in the structure, and it should be reinforced accordingly during design and construction. The resonance will significantly increase the displacement of the retaining wall and the strain of the reinforcement material, resulting in the failure of the retaining wall, and this phenomenon should be avoided in the project. The results of this study can provide a reference for the design and construction of reinforced earth retaining walls in confined space, and promote the construction and application of the structure in earthquake-prone areas.