Abstract:By reviewing, analyzing and comparing the situations in the construction engineering of the basement exterior walls before the 1980s and in the 1980s, and the cracks of basement exterior walls in the 1990s, from the aspects of raw material control and construction technology, the measures and suggestions of how to avoid or reduce the harmless cracks and the harmful cracks of basement exterior walls are put forward. The achievements can be referred for the units of construction, raw material and concrete supply.