The utility model relates to a heat-insulation secondary post-poured bare concrete wall body. The heat-insulation secondary post-poured bare concrete wall body comprises an original structure wall body (1), a bare concrete pavement (1) and a heat-insulation interlayer (2), wherein the heat-insulation interlayer (2) is adhered onto the outer surface of the original structure wall body (3); the bare concrete pavement (1) is poured on the heat-insulation interlayer (2); the bare concrete pavement (1) is internally provided with a reinforcing mesh (4); embedded steel bars (5) are arranged in each of the bare concrete pavement (1), the heat-insulation interlayer (2) and the original structure wall body (3). The heat-insulation type secondary post-poured bare concrete wall body realizes beautifying decoration and energy-saving modification of an old building and meets the using demands.