The definition of lognormal distribution as well as its relationship to the original distribution are redescrribed.A common error in the use of lognomal destribution is corrected.

• 本文对对数正态分布的数学含义及其与原始分布之间的关系作了重新说明，纠正了目前化探中使用对数正态分布假设时常犯的一个错误。