Abstract: The large-scale mining of coal resources has led to an increase in the demand for coal storage yards, resulting in spontaneous combustion during the storage of mined coal, which has caused great waste and harm to coal resources.Based on the research background of spontaneous combustion in coal storage yard of Shenwei Pipe Transportation Company, this paper studies the law of spontaneous combustion in coal storage yard by theoretical analysis and indoor experimental detection, and puts forward the monitoring and early warning technology of spontaneous combustion according to previous research and actual working conditions on site.The research shows that there are two factors such as internal and external factors in the spontaneous combustion of coal storage yard, which are affected by its own attributes and external equipment.According to the theoretical analysis of the experimental tube, temperature control and oxygen consumption rate, the calculation formula of spontaneous combustion rate and CO concentration is obtained.According to the relationship between CO concentration and temperature of coal samples and the relationship between oxygen consumption rate and temperature of coal samples obtained by laboratory testing, based on experimental determination and spontaneous combustion cycle calculation formula, the shortest spontaneous combustion period of pressure filtered coal samples and centrifugal coal samples in coal storage yard is about 26 d and 29 d, respectively, and targeted monitoring and early warning technology is proposed.