With the development of economy and the higher degree of complication business.The accounting information quality has become a common focus of the enterprise itself and the community.Accounting information more and more serious,making enterprises should pay attention to improving the quality of accounting information.This paper discusses the basic concept of accounting information quality and summarizes the status of f accounting information quality.Based on fundamental content of accounting information quality,this paper uses AHP to determine the weights of each indicator in the index system for the inherent ambiguity of accounting information quality,and introduces fuzzy mathematics method to solve the ambiguity problems of the evaluation effectively,which makes a reasonable assessment for the quality of accounting information.