"The guaranted lowest price" is a kind of frequent competition strategy of the commercial department in the market competition. This article limits the strategic behavior of carrefour and auchan to "guaranteed lowest price". 保证最低价是商业企业在市场竞争中经常运用的竞争策略。本文将家乐福和欧尚两家大型超市保证最低价的策略行为界定为企业间一种默契式的价格协调行为。