Abstarct: The coal spontaneous combustion in coal mines is one of the most important problems in all coal production countries and is a big fear for industries and researchers involved in this field study. Most of the coal fires due to spontaneous combustion will be started in a small area and gradually influence to a wide area, that have greatly threatened the mining industry and have been considered as one of the major catastrophes in many country. The results of coal spontaneous combustion is enormous economic losses and personal casualties, increase the temperature inside the mine, creating problem in mine ventilation; the damage resulting from coal spontaneous combustions have also led to massive environmental pollution. Thus, coal spontaneous combustions are an immediate problem to solve. In this research, according to a review of all the latest, known and credible studies about coal spontaneous combustion from around the world and identification of many important and effective parameters, and selected 15 parameters which were applicable to the evaluation. After identification the effective parameters on coal spontaneous combustion, for using the FDAHP method and determination weight of each parameter, a technical questionnaires prepared and sent to experts. Then, for providing a quantitative classification system, baxsed on the effective parameters of coal spontaneous combustion capability, the qualitative experts' response by FDAHP method were analyzed and the weight of each parameter was obtained. In the other method using RES approach, the weight of each parameter was calculated; that comparison of 2 methods illustrared relatively good concordance. With access to the weight of each parameter, a new quantitative classification system was proposed which ‘‘Coal Spontaneous Combustion Potential index (CSCPi) ’’ has been named. In the CSCPi system, a number from 0 to 100 can be assigned to each coal laxyers, with higher values corresponding to greater ease of coal spontaneous combustion capability. baxsed on the CSCPi classification, coal laxyers are classified into three modes from the view point of coal spontaneous combustion capability: low, medium, high. Then with obtain data related to the intrinsic, geological and mining charactristics, special index calculated for each laxyer in Pashkalat, Kelariz and Razmja coal region of laxyers of Eastern Alborz mines company. So, a comprehensive and perfect evalution of the laxyers in the study area were presented. Finally, by using the event of spontaneous combustion occurred in the region, an initial validation for the application systematic approach in the study area was conducted. That were comparison demonstrated relatively good concordance.