The invention relates to the technical field of concrete, in particular to a lightweight concrete wall body having a self-heat preservation effect. The lightweight concrete wall body is prepared fromthe following raw materials: 15 to 35 parts of pulverized fuel ash, 10 to 18 parts of ash calcium powder, 8 to 15 parts of mountain flour 70 sand, 3 to 11 parts of glass beads, 20 to 35 parts of Portland cement, 5 to 10 parts of porous fiber, 5 to 12 parts of kieselguhr, 4 to 11 parts of attapulgite, 0.5 to 3.6 parts of first foaming agent, 20 to 48 parts of lightweight aggregate, 2 to 7 parts ofwaste rubber powder, 0.6 to 1.8 parts of water reducing agent and 1 to 5 parts of other assistants, wherein the porous fiber is prepared from the following substances: 15 to 36 parts of first polymeremulsion, 13 to 49 parts of second polymer emulsion, 0.3 to 6.4 parts of second foaming agent, 3 to 9 parts of soluble metal salt, 5 to 25 parts of chain extender and 6 to 23 parts of graphene oxide.According to the lightweight concrete wall body disclosed by the invention, by adding the glass beads, the porous fiber and the waste rubber powder in concrete, a rich composite porous structure not only is capable of effectively reducing self weight of the concrete and meeting the requirements on light weight, but also has higher sound insulation and heat preservation properties, so that the self-heat preservation effect of the lightweight concrete wall body is ensured.