Abstract: Based on the construction in loess saline soil of Xining,the common method of foundation treatment in loess saline soil is studied,and the successes and failures in construction are summarized.The results show that the change of geological environment is an important influence factor for engineering properties in loess saline soil which should not be ignored,and it is a key point for the successful application of foundation treatments.This research is a fundamental guidance for adjusting the saline soil foundation treatment method according to local conditions.