The invention provides a self-insulating wall composed of prefabricated assembled wall panels, which is composed of columns, beams, doors or windows, thermal insulation materials and prefabricated assembled wall panels; the columns and beams are reinforced concrete structures or Sectional steel structure; prefabricated wall panels include reinforced concrete ribs, interior wall panels, exterior wall panels and ribbed steel mesh; reinforced concrete ribs include side ribs of prefabricated wall panels and middle ribs of prefabricated wall panels; The reinforced concrete rib is a cavity rib, and the cavity rib is formed by a ribbed steel mesh cylinder, and the self-insulation material formed by cement slurry foaming is poured into the ribbed steel mesh cylinder; Steel mesh hollow body; self-insulation material formed by foaming cement slurry is poured in the ribbed steel mesh hollow. Strong integrity, reasonable structure, high quality standard, controlled process, good self-insulation.