The invention provides a coal mine safety evaluation system based on improved k-means clustering. The coal mine safety evaluation system comprises a mine safety data input module, a data analysis module based on the improved k-means clustering and a result output module, wherein the mine safety data input module receives mine safety state data submitted by a user, the data analysis module based on the improved k-means clustering analyzes the mine safety state data by adopting an improved k-means clustering method, and the result output module displays a data analysis result so as to provide auxiliary basis for the safety management decision of a coal mine enterprise. By adopting the coal mine safety evaluation system, the scoring result of the mine safety evaluation of the coal mine enterprise can be analyzed, the comprehensive management of the coal mine safety evaluation can be realized, and the evaluation result can provide important technical base for the management decision of the coal mine enterprise.