The invention discloses a self-waterproof basement earth-retaining sidewall. A waterproof plate 2 is embedded in the earth-retaining sidewall 1; the waterproof plate 2 is a rustproof metal plate; and the top edge and the bottom edge of the waterproof plate are embedded and fixed in a bottom plate 8 and a top plate 9 of a basement respectively. The self-waterproof basement earth-retaining sidewall disclosed by the invention is long in waterproof life, high in waterproof quality, convenient to construct, short in overall construction period, and good in economic benefits.