Abstract: The microscopic identification of minerals can often be improved with the use of computer technology. An auxiliary analysis program for the microscopic identification of minerals based on Visual Basic tools is described in this paper. Design methods and procedures of the program, including mineral properties analysis and digitization, identification error reduction methods are discussed. When using the application for determination of minerals, it is acceptable to input complete or part of the optical properties of query minerals during microscopic observation. Through calculation and comparison, final search results can match most query minerals. The application analysis results demonstrate the accuracy and efficiency for identifying query minerals. The program can also identify more mineral information, such as optical properties, the causes of the occurrence and identification characteristics. In addition, the program can be used to establish a mineral information database.