提出了基于知识发现和决策规则基础的盐碱地GIS和遥感分类的方法，这种的特点是把盐碱地分类的地学专家思想和区域专家的思想应用到GIS数据挖掘中，并把从GIS数据库中发现的知识，按一定的规则应用到盐碱地分类的决策中。

This paper presents the classification of saline soil method，based on knowledge discovery and decision supporting rule base systems using remotely sensed data and GIS The geo science expert thoughts and expe riences to GIS data mining resulied from classificafion。f saline soil and monitoring secondary soil salinization are introduced．In the study，we construeted perfection knowledge discovory rules which are applied to the North China Plain．The resulting rules are used to improve knowledge discovery systera performance．